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CrossFit Kids is a method for teaching CrossFit to children and teens, ages 3-18.
CrossFit is a fitness regimen developed by Coach Greg Glassman over several decades. He was the first person in history to define fitness in a meaningful, measurable way (increased work capacity across broad time and modal domains). CrossFit itself is defined as that which optimizes fitness (constantly varied functional movements performed at relatively high intensity).
In the latter half of 2003, Jeff and Mikki Lee Martin started using CrossFit with the teens at their small martial arts studio in Ramona, California. Soon after that, Coach Glassman requested that the Martins create a program specifically for children, and the first CrossFit Kids workout appeared on the Internet (http://www.crossfitkids.com). The CrossFit Kids program is now in thousands of gyms and schools around the world.
CrossFit Kids is a strength-and-conditioning program that is specially designed for kids and teenagers and their specific developmental needs and helps them to develop a lifelong love of fitness. In a group setting, children and teens participate in fun and engaging workouts that deliver measurable results and prepare them to be well-rounded athletes.
CrossFit Kids workouts consist of constantly varied, functional movements that deliver a fitness that is broad, inclusive and general (B.I.G.) and are scalable for any participant at any level.


What Does This Mean?

Constantly varied means that, for the most part, no two workouts are the same, so kids and teens never get bored and the novelty of each workout keeps them excited about participating.
The functional movements involve exercises that are fundamental to all things that kids need to do when they play—- pull, push, run, throw, climb, lift and jump. All of the movements are taught safely and effectively under the close supervision of thoroughly trained CrossFit Kids trainers.
When fitness is defined as broad, inclusive, and general (B.I.G.) it means that participants will become well-rounded athletes who will be better at any and every sport that they play because CrossFit Kids doesn’t coach them to be good at just one thing.
Our workouts will increase physical competence in 10 fitness domains: Cardiovascular and Respiratory Endurance, Stamina, Strength, Flexibility, Power, Speed, Coordination, Agility, Balance, and Accuracy.
With workouts that are scalable, CrossFit Kids can equally benefit a person who is less active or an accomplished athlete by tailoring workouts so that each participant is challenged just enough to deliver measurable results and personal athletic progress.
CrossFit Kids aims to avert childhood obesity by creating an excitement about exercising and providing the foundation for a lifetime of healthy eating by focusing on the importance of good nutrition that complements physical activity. While workouts are fun, they also increasingly demand strength, stamina and perseverance. The physical and mental demands of CrossFit Kids foster self-confidence, discipline, persistence, problem solving, and integrity that can be applied in all areas of children’s lives.
Important Safety Note: Start slow. Yes, we want the kids to work hard, but we never demand children to work harder or faster during a workout. This is a critically important point: With children, we always privilege good movement over speed.
(1) We do not want them so sore the next day that they are hurting.
(2) It is our long-standing experience that when children move well consistently over time, they will eventually move faster safely.


General Age-Appropriate Guidelines:

Preschool (Ages 3-5): Able to focus enough to engage in supervised play that involves fundamental movement skills and the simplest foundational movements, e.g., the squat. All movements are done without weights. To make this clear: We NEVER load preschool-age kids during a workout. NEVER.

Elementary (Ages 5-12): Able to focus and take instruction on the foundational CrossFit movements. Introduction to gymnastics-style resistance training with very light external objects, e.g., starting with a PVC pipe and moving toward 10-pound dumbbells contingent on capacity.

Novice (Ages 12-14): Approaching proficiency in body weight movements and seeing an increase in volume. Familiar with light dumbbell movements and beginning to use barbells with light loads.

Junior Varsity (Ages 13-16): Proficient in body weight movements. Starting to explore heavier loads with weighted movements and higher volumes and intensity more generally.

Varsity (Ages 13-18): Comfortable with high-volume, high-intensity body weight movements. Capable of executing some complex gymnastic movements, eg, the muscle-up, handstand walking, and the handstand push-up, and is starting to explore, under experienced supervision, more advanced gymnastics movements, eg, levers, ring handstand push-ups. Comfortable with powerlifting and Olympic weight lifting movements. It should be noted that Varsity-level kids ages 13-14 are exceptional and would likely have many years of training at a registered CrossFit Kids program.

Is CrossFit Kids safe?

This is a pretty broad question, but it does serve as a starting point to discuss the many levels of safety that CrossFit Kids takes into account.  The primary way in which CrossFit Kids ensures the safety of participants is to require that ALL trainers attend the two-day CrossFit Kids Trainer Course.  This course also requires previous attendance at the two-day CrossFit Level One Trainer Certificate Course as well as passing the associated written exam.  Therefore, CrossFit Kids trainers not only have a working knowledge of CrossFit but also how CrossFit Kids differs from the adult program.  Further, all CrossFit Kids trainers in the United States must submit to a yearly background check regardless of whether this is required for their occupation (internationally, laws vary and many require governmental background checks for those individuals who work with children).  Perhaps most significantly, Crossfit Kids is an exercise program that views good movement as a key factor in maintaining health for children from preschool to high school.  CrossFit Kids stresses proper movement mechanics at all ages, and consistency of good movement is a necessity before loads are added or intensity is increased.

What about kids who are severely overweight or out of shape?

One of the hallmarks of CrossFit Kids is inclusion.  Training in a group of peers can have a profound positive effect, increasing daily compliance with the program, pushing mental and physical limits, and maintaining a positive sense of self (Beets et al. and Vorhees et al.).  Children that are deconditioned will also benefit from exercising in a group.  The key to incorporating children with various physical abilities is in modulating the planned workout of the day (WOD), often referred to as scaling.  During the CrossFit Kids Trainer Course many scaling scenarios and solutions are discussed with the intention of showing how deconditioned children can be integrated into a class simply by modifying the WOD or its component movements to accommodate differing abilities and capacities.  The CrossFit Kids website also provides scaling options for each day’s WOD, from the varsity to pre-school ability level.  The immediate goal is inclusion and maintenance of the general movement patterns, the long-term goal is to have each individual continue to improve and require a decreasing amount of scaling.

Beets MW et al. Social support and youth physical activity: The role of provider and type. American Journal of Health Behavior 30(3): 278-289, May 2006.
http://www.ncbi.nlm.nih.gov/pubmed/16712442

Vorhees CC et al. The role of peer social network factors and physical activity in adolescent girls. American Journal of Health Behavior 29(2): 183-190, 2005.
http://www.ncbi.nlm.nih.gov/pubmed/15698985

Is strength training safe for children?

Yes. But first, let’s look at the benefits of a strength-training program for kids.

Potential benefits of pediatric resistance training*

  • Increase muscle strength
  • Increase muscle power
  • Increase local muscle endurance
  • Enhance motor skill performance
  • Increase bone mineral density
  • Improve body composition
  • Improve insulin sensitivity
  • Improve blood lipid profile
  • Reduce risk of sport-related injuries
  • Enhance sports performance
  • Stimulate a more positive attitude toward lifetime physical activity

* Faigenbaum AD and Myer GD. Pediatric resistance training: Benefits, concerns, and program design considerations. Current Sports Medicine Reports 9(3): 161–168, May/June 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20463500

 

In fact, in 2001, and subsequently in 2008, the American Academy of Pediatrics published position statements endorsing strength training for children (Bernhardt et al. and Council on Sports Medicine & Fitness). Other institutions have also come forward to approve of strength training for children: the National Strength and Conditioning Association (Faigenbaum et al.), the Canadian Society for Exercise Physiology (Behm et al.), and the National Institute for Clinical Excellence (British – NICE position paper).

Strength training “may include the use of free weights, weight machines, elastic tubing, or body weight” (Bernhardt et al.).  Of particular interest are the gender-specific benefits that strength training offers.  Faigenbaum and Myer stipulate that “boys naturally demonstrate that power, strength, and body coordination increase with chronological age, which correlates to maturational stage, whereas untrained girls on average show little improvement in strength, balance, and power throughout puberty.”  This disparity in natural development leaves open the possibility that additional training might close the gap.  Indeed, “girls have been shown to improve strength measures up to 92% with just 6 [weeks] of training” (Faigenbaum & Myer).  Resulting in “reduced knee injuries in adolescent and mature female athletes” (Faigenbaum & Myer).

The Academy recommends that a strength-training program for children have several attributes in order to be acceptable:

Recommendations for a youth strength-training program*

  1. Overall program design elements
    1. Follow proper resistance techniques and precautions to ensure safety and efficacy.
    2. Provide qualified instruction and close supervision.
    3. Ensure the exercise environment is safe and free of hazards
    4. Address all major muscle groups, including the core, and exercise through the complete range of motion. More sports-specific areas may be addressed subsequently.
    5. Include exercises that require balance and coordination.
    6. Keep the program fresh and challenging by systematically varying the training program.
  2. Preadolescents and adolescents should avoid powerlifting, bodybuilding, and maximal lifts until they reach physical and skeletal maturity.
  3. As the AAP has stated previously, athletes should not use performance-enhancing substances or anabolic steroids. Athletes who participate in strength-training programs should be educated about the risks associated with the use of such substances.
  4. Class Structure
    1. a. Athletes should have adequate intake of fluids and proper nutrition, because both are vital in maintenance of muscle energy stores, recovery, and performance.
    2. Any sign of illness or injury from strength training should be evaluated fully before allowing resumption of the exercise program.
    3. Begin each session with a 10- to 15-minute dynamic warm-up.
    4. Focus on developing proper exercise technique and learning fundamental training principles.  Once the exercise technique has been mastered, incremental loads can be added using either body weight or other forms of resistance.  Resistance train 2-3 times each week on nonconsecutive days.
    5. Aerobic conditioning should be coupled with resistance training if general health benefits are the goal.
    6. Cool down with less intense activities and stretching.
  5. Instructors or personal trainers should have certification reflecting specific qualifications in pediatric strength training.
  6. Medical approvals
    1. Before beginning a formal strength-training program, a medical evaluation should be performed by a pediatrician or family physician. Youth with uncontrolled hypertension, seizure disorders, or a history of childhood cancer and chemotherapy should be withheld from participation until additional treatment or evaluation. When indicated, a referral may be made to a pediatric or family physician sports medicine specialist who is familiar with various strength-training methods as well as risks and benefits for preadolescents and adolescents.
    2. Children with complex congenital cardiac disease (cardiomyopathy, pulmonary artery hypertension, or Marfan syndrome) should have a consultation with a pediatric cardiologist before beginning a strength-training program.

* Adapted and modified from:
Academy of Pediatrics Council on Sports Medicine and Fitness.  Strength training by children and adolescents. Pediatrics 121(4): 835-840, April 2008.
http://www.ncbi.nlm.nih.gov/pubmed/18381549

Faigenbaum AD and Myer GD. Pediatric resistance training: Benefits, concerns, and program design considerations. Current Sports Medicine Reports 9(3): 161–168, May/June 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20463500

The CrossFit Kids program complies with these suggestions. 

Dr. Avery Faigenbaum is a leader in the field of pediatric exercise science. He has more than seventy referenced papers in the PubMed database (pubmed.gov) on this topic.  Faigenbaum et al. directly address the injury risk associated with strength training, citing several research articles, including a prospective study (Zaricznyj et al.) documenting all types of sports-related injuries in school-aged children over a one-year period. This paper found that “resistance training resulted in 0.7% of 1576 injuries whereas football, basketball, and soccer resulted in approximately 19, 15, and 2%, respectively, of all injuries” (Faigenbaum et al.).  Proper training of technique and constant supervision are potentially the largest reasons behind these impressive safety statistics (Faigenbaum et al.).  Faigenbaum and Myer also note that the vast majority of injuries sustained by adolescents during resistance training can be classified as “accidental,” where the descriptions of the incidents include such words as “pinching” and “dropping” (Faigenbaum & Myer).  Finally, Faigenbaum et al. explain that current research and clinical observation indicate that plyometric movements are also safe for children as long as volume, intensity, and frequency are taken into consideration (Faigenbaum et al.).  This topic is discussed during the two-day CrossFit Kids Trainer Course.

Academy of Pediatrics Council on Sports Medicine and Fitness.  Strength training by children and adolescents. Pediatrics 121(4): 835-840, April 2008.
http://www.ncbi.nlm.nih.gov/pubmed/18381549

Behm DG et al. Canadian Society for Exercise Physiology position paper: Resistance training in children and adolescents. Applied Physiology, Nutrition, and Metabolism. 33(3): 547-561, June 2008.
http://www.ncbi.nlm.nih.gov/pubmed/18461111

Bernhardt DT et al. Strength training by children and adolescents. Pediatrics 107(6): 1470-1472, June 2001.
http://www.ncbi.nlm.nih.gov/pubmed/11389279

Faigenbaum AD et al. Youth resistance training: Updated position statement paper from the national strength and conditioning association. Journal of Strength and Conditioning Research 23(5 Suppl): S60-S79, August 2009.
http://www.ncbi.nlm.nih.gov/pubmed/19620931

Faigenbaum AD and Myer GD. Pediatric resistance training: Benefits, concerns, and program design considerations. Current Sports Medicine Reports 9(3): 161–168, May/June 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20463500

National Institute for Health and Clinical Excellence. Promoting physical activity, active play and sport for pre-school and school-age children and young people in family, pre-school, school and community settings. Public Health Guidance 17: 1-89, January 2009.
http://www.bases.org.uk/write/documents/NICE%202009.pdf

Zaricznyj B et al. Sports-related injuries in school-aged children. American Journal of Sports Medicine 8(5): 318-324, September-October 1980.
http://www.ncbi.nlm.nih.gov/pubmed/7416348

Will my child not grow properly if weights are used?

This question is particularly common and stems from the fact that the very ends of growing bones (growth plates) are softer than adjacent bone and even the surrounding connective tissue.  Additionally, the cartilage lining joint surfaces and the attachment sites of major tendons to bone is also susceptible to injury during developmental growth phases.  As far as a properly run strength-training program is concerned, Faigenbaum et al. state that “there is no evidence to suggest that resistance training will negatively impact growth and maturation during childhood and adolescence.”  Proper coaching, spotting, and loading are a requirement to maintain an injury-free program; the CrossFit Kids program mandates all three aspects.  In addition, CrossFit Kids’ directives for age-appropriate movements as well as mechanical perfection and consistency before increasing loads have resulted in no cases of growth-plate damage being reported.  Indeed, “Current findings from pediatric resistance training studies indicate a low risk of injury in children and adolescents who follow age-appropriate training guidelines” (Faigenbaum and Myer) and “[a]lthough a few retrospective case reports noted injury to the growth cartilage in youth, most of these injuries were caused by improper lifting techniques, poorly chosen training loads, or lack of qualified adult supervision” (Faigenbaum & Myer).  It is important to note that not all growth-plate injuries are acute, some may be associated with repetitive use, especially in baseball players and gymnasts (Perron, Miller, & Brady and Frush & Lindenfeld). Therefore, if these injuries are suspected to have occurred, one should seek medical attention immediately.  For additional reading, please see Martin and Rodi’s “Weightlifting and kids: Dispelling the myths” in the February 2008 edition of the CrossFit Kids Magazine.


Faigenbaum AD and Myer GD. Pediatric resistance training: Benefits, concerns, and program design considerations. Current Sports Medicine Reports 9(3): 161–168, May/June 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20463500

Faigenbaum AD et al. Youth resistance training: Updated position statement paper from the national strength and conditioning association. Journal of Strength and Conditioning Research 23(5 Suppl): S60-S79, August 2009.
http://www.ncbi.nlm.nih.gov/pubmed/19620931

Frush TJ and Lindenfeld TN. Peri-epiphyseal and overuse injuries in adolescent athletes. Sports Health: 1, 201–211, 2009.
http://www.ncbi.nlm.nih.gov/pubmed/23015873

Martin J and Rodi C. Weightlifting and kids: Dispelling the myths. CrossFit Kids Magazine 27: 3-12, February 2008.
http://catalog.brandxmartialarts.com/pub/CFKKids&WeightLiftingFeb2008.pdf

Perron AD, Miller MD, and Brady WJ. Orthopedic pitfalls in the ED: Pediatric growth plate injuries. American Journal of Emergency Medicine 20(1): 50-54, January 2002.
http://www.ncbi.nlm.nih.gov/pubmed/11781914

Why is jumping incorporated into CrossFit Kids classes on a daily basis?

As referenced above, plyometric movements are acceptable for children to perform; in fact, they have been shown to improve athletic abilities and prevent injuries (Faigenbaum et al.).  Besides these benefits, jumping, or impact loading of any sort, is beneficial to bone health (Chen et al.), specifically, those that increase bone-force strain and rate (Skerry). In pre- and early peri-puberty where bone growth velocity and bone mineral content are increasing, a window of opportunity opens for interventions to be of great benefit, such as fracture prevention (MacKelvie, Khan, & McKay and Karlsson & Rosengren).  Not only are these benefits relevant in the short term, research also indicates the effects may be rather long-lasting (Karlsson & Rosengren and Weeks & Beck).  Realizing this opportunity, CrossFit Kids recommends programming some form of impact loading for every class.  Box jumps, burpees, tuck jumps, jump rope, and certain weightlifting movements (for appropriate ages and abilities) are just some examples of how to incorporate increased load, high-rate movements into some component of every CrossFit Kids class.  Please note that care should be taken implementing impact loading for adolescents that are severely overweight.  Keeping in mind the excess load their skeletal system is carrying, the initial goal for this population is to get them to a healthier bodyweight.

Chen JH et al. Boning up on Wolff’s Law: Mechanical regulation of the cells that make and maintain bone. Journal of Biomechanics 43(1): 108-118, January 2010. http://www.ncbi.nlm.nih.gov/pubmed/19818443

Faigenbaum AD et al. Youth resistance training: Updated position statement paper from the national strength and conditioning association. Journal of Strength and Conditioning Research 23(5 Suppl): S60-S79, August 2009.
http://www.ncbi.nlm.nih.gov/pubmed/19620931

Karlsson MK and Rosengren BE. Training and bone—From health to injury. Scandinavian Journal of Medicine & Science in Sports 22(4): e15-e23, August 2012.
http://www.ncbi.nlm.nih.gov/pubmed/22429254

MacKelvie KJ, Khan KM, and McKay HA. Is there a critical period for bone response to weight-bearing exercise in children and adolescents? A systematic review. British Journal of Sports Medicine 36(4): 250-257, August 2002.
http://www.ncbi.nlm.nih.gov/pubmed/12145113

Skerry TM. Mechanical loading and bone: What sort of exercise is beneficial to the skeleton? Bone 20(3): 179-181, March 1997.
http://www.ncbi.nlm.nih.gov/pubmed/9071466

Weeks BK and Beck BR. Are bone and muscle changes from POWER PE, an 8-month in-school jumping intervention, maintained at three years? PLoS ONE 7(6, e39133): 1-6 June 2012.
http://www.ncbi.nlm.nih.gov/pubmed/22720051

What are the benefits of all the tumbling the kids do in CrossFit Kids classes?

Tumbling is only part of the programming CrossFit Kids uses to make sure that the vestibular system is properly stimulated.  The program also utilizes many additional exercises such as handstands, skin-the-cats, and bar roll-overs to further accomplish this goal.  The vestibular system begins with the inner ear; from here sensory neurons reach the brain and are able to integrate information in order to determine orientation and acceleration.  The vestibular system is estimated to have evolved ~500 million years ago (humans split from their nearest evolutionary relative only 6 million years ago) and may be as important as self-locomotion itself (Smith, Darlington, & Zheng). Dysfunction of the vestibular system, including the sensory mechanism as well as all downstream connections, can be the cause of various learning disabilities, anxiety and depression (Smith, Darlington, & Zheng and Wiss). For example, individuals who suffer from inner-ear fluid leakage present with “a variety of cognitive and emotional symptoms, including memory and attention deficits, anxiety, and depression” (Smith, Darlington, & Zheng). Further, astronauts experience what is called the “space stupids,” a result of the interactions of microgravity on the inner ear (Smith, Darlington, & Zheng).  To this end, CrossFit Kids has made it a priority to include these types of movements everyday.

Smith PF, Darlington CL, and Zheng Y. Move it or lose it—Is stimulation of the vestibular system necessary for normal spatial memory? Hippocampus 20(1): 36-43, January 2010.
http://www.ncbi.nlm.nih.gov/pubmed/19405142

Wiss T. Vestibular dysfunction in learning disabilities: Differences in definitions lead to different conclusions. Journal of Learning Disabilities 22(2): 100-101, February 1989.
http://www.ncbi.nlm.nih.gov/pubmed/?term=2783723

Why do kids and teens study after a CrossFit Kids class at an affiliate and why does CrossFit Kids believe so strongly in implementing the program within schools?

The primary goals of CrossFit Kids are to improve movement and instill a positive lifelong association between health and fitness; however, if in doing so, the program also generates a multitude of cognitive benefits (as suggested by the studies cited below), we feel it is our responsibility to maximize their impact.  For this reason, at affiliates, we suggest providing 15-20 minutes of study time immediately after a CrossFit Kids class (focusing on high-school aged children).  And on a larger scale, implementing more movement into what is a long, sedentary day at school may actually improve overall scholastic performances.

There are dozens of studies showing the correlation between exercise and aerobic fitness with improved brain function.  A statistical, meta-analysis published in 1997 of 134 of these studies (Etnier et al.) showed that “exercise had a small positive effect on cognition.”  Although the effect they observed among these studies was small, the paper brought to light some weaknesses in the design of previous studies.  Subsequently, many new studies have been done to bolster the evidence supporting the connection between exercise and cognitive abilities.  A more recent review of the topic published in 2008 (Tomporowski et al.) clearly delineates the difference between the association of exercise/fitness with academic achievement, standardized test results, and cognitive test results.  Tomporowski et al. conclude that “exercise training programs may prove to be simple, yet important, methods of enhancing aspects of children’s mental functioning that are central to cognitive and social development.”  Additional scientific research into the connection of specific brain functions with exercise or fitness has also been conducted. Comparing fit and unfit 9-10-year-old children, Chaddock et al. show that the fit kids had higher recognition memory performances than the less fit kids.  And Hilllman et al. demonstrate the advantages of even a single bout of exercise on cognitive performance.  Perhaps the strongest evidence supporting the notion that it is “what you do” rather than “what you are born with” comes from a statistical analysis of 1.2 million men upon entry into the Swedish military (Aberg et al.), where analysis of nearly 1500 twin pairs indicate that

<15% of the association between aerobic fitness and cognitive performance was due to genetics!

Although Tomporowski et al. accurately state that “at this time, no theory has been proposed that satisfactorily addresses the relation between exercise and cognition,” it is not for lack of research. One of the more intriguing findings came from two papers published in 1999 (van Praag, Kempermann, & Gage and van Praag et al.). In these papers the researchers note that voluntary wheel running in rodents actually resulted in the growth of new neurons in a part of the brain called the hippocampus, a region involved in memory and learning. Correlative experiments have since been done relating this to humans (Pereira et al.). These gross anatomical changes also correlate with signaling cascades happening on the molecular level. The hormone insulin-like growth factor 1 (IGF-1) and the neurotrophin brain-derived neurotrophic factor (BDNF) are elevated during and after the cessation of exercise (Zolad & Pilc and Trejo, Carro, & Torres-Alemán). The elevation of BDNF following exercise (Schmidt-Kassow et al. and Rojas Vega et al.) and its role in hippocampal function provides a window of opportunity where studying may be doubly beneficial. For additional reading on this topic please see John Medina’s

Brain Rules (http://brainrules.net/) and John Ratey’s Spark (http://www.johnratey.com/newsite/index.html).

Aberg, MAI et al. Cardiovascular fitness is associated with cognition in young adulthood. Proceedings of the National Academy of Sciences of the United States of America 106(49): 20906-20911, December 8, 2009.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2785721/

Chaddock L et al. Aerobic fitness and executive control of relational memory in preadolescent children. Medicine and Science in Sports and Exercise 43(2): 344-349, February 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20508533

Etnier JL et al. The influence of physical fitness and exercise upon cognitive functioning: A meta-analysis. Journal of Sport & Exercise Psychology 19(3): 249-277, 2002.
http://www.cabdirect.org/abstracts/19981807108.html

Hillman CH et al. The effect of acute treadmill walking on cognitive control and academic achievement in preadolescent children. Neuroscience 159(3): 1044-1054, March 31, 2009.
http://www.ncbi.nlm.nih.gov/pubmed/19356688

Pereira AC et al. An in vivo correlate of exercise-induced neurogenesis in the adult dentate gyrus. Proceedings of the National Academy of Sciences of the United States of America 104(13): 5638-5643, March 27, 2007.
http://www.pnas.org/content/104/13/5638.full.pdf+html

Rojas Vega S et al. Acute BDNF and cortisol response to low intensity exercise and following ramp incremental exercise to exhaustion in humans. Brain Research 1121(1): 59–65, November 22, 2006.
http://www.ncbi.nlm.nih.gov/pubmed/17010953

Schmidt-Kassow M et al. Kinetics of serum brain-derived neurotrophic factor following low-intensity versus high-intensity exercise in men and women. Neuroreport 23(15): 889–893, October 24, 2012.
http://www.ncbi.nlm.nih.gov/pubmed/22964969

Tomporowski PD et al. Exercise and children’s intelligence, cognition, and academic achievement. Educational Psychology Review 20(2): 111-131, 1 June 2008.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2748863/

Trejo JL, Carro E, and Torres-Alemán I. Circulating insulin-like growth factor I mediates exercise-induced increases in the number of new neurons in the adult hippocampus. Journal of Neuroscience 21(5): 1628–1634, March 1, 2001.
http://www.jneurosci.org/content/21/5/1628.full.pdf

van Praag H, Kempermann G, and Gage FH. Running increases cell proliferation and neurogenesis in the adult mouse dentate gyrus. Nature Neuroscience 2(3): 266-270, March 1999.
http://neurogenesisresearch.com/Runing_and_Neurogenesis_Nat.pdf

van Praag H et al.  Running enhances neurogenesis, learning, and long-term potentiation in mice. Proceedings of the National Academy of Sciences of the United States of America 96(23): 13427-13431, November 9, 1999.
http://www.pnas.org/content/96/23/13427.full.pdf+html

Zoladz JA and Pilc A. The effect of physical activity on the brain derived neurotrophic factor: From animal to human studies. Journal of Physiology and Pharmacology 61(5): 533-541, October 2010.
http://www.ncbi.nlm.nih.gov/pubmed/21081796

Do kids need to eat immediately after a CrossFit Kids class?

As a general response the answer is no, kids do not need to eat immediately following a CrossFit Kids class. They can go directly back to an academic class period or onto other activities.  Our primary recommendation for all age groups is to maintain proper hydration, both before and after CrossFit Kids classes.  Often exercise can actually act as an appetite suppressant. Perhaps the only time where post-workout nutrition should be actively considered is with kids or teens that attend a CrossFit Kids class after lunch period and may have additional sports practice after school or no ready access to food until much later, e.g., at dinner.  Under these circumstances, a snack of high-quality, whole foods is recommended.

Martins C et al. Effects of exercise on gut peptides, energy intake and appetite. Journal of Endocrinology 193(2): 251-258, May 2007.
http://www.ncbi.nlm.nih.gov/pubmed/17470516

Can I train teen athletes in my adult CrossFit classes?

Training teens within your adult CrossFit classes absolutely allowed, but it is not your best option. If you have one or two teens in your gym, then having them workout with your adult classes is better then not letting them workout. However, as soon as you have three teenagers and appropriately trained staff, you should start your teens program. The CrossFit Kids Teens curriculum is designed to target the specific developmental needs of that population in terms of the following:
Physical growth and development

  • Physical growth and development
  • Impact of vestibular training
  • Assisting cognitive development
  • Fun and peer interactions
  • Safety

Physical development
Teens are growing, often rapidly and inconsistently, which introduces some neuromuscular and musculoskeletal system challenges that do not exist in adults. It is possible for a teen to grow several inches in a very short period of time, which lengthens the levers he or she are operating during weight lifting and gymnastic-type movements. The rapid change in dimensions also affects their sense of “body awareness” or understanding of where they are in space. This is why teens often appear more clumsy or uncoordinated after a period of rapid growth. For this reason, the CrossFit Kids Teen programming gives considerably more attention to skill work than your average adult class. This allows the opportunity to teach or reteach complex skills and weight-lifting movements outside of the context of the WOD.
Along with rapid growth of the skeletal system comes the risk for muscle and tendon impairments. Often the muscles cannot keep up with the rate of skeletal growth, which leads at best to inflexibility and potentially to muscle or joint injury such as tendonitis, bursitis, tendon tears, or even complete ruptures at the attachment sites. All CrossFit Kids Teen classes include dedicated and appropriately supervised stretching and mobility work in order to combat sudden changes in muscular length-tension relationships.
Finally, teen programming incorporates considerably more impact-loading activities than the average adult class. Please refer to the FAQ titled “Why is jumping incorporated into CrossFit Kids classes on a daily basis?” for additional information regarding the importance of impact loading for normal bone development and long-term heath in kids and teens.

Neurological development
The area of the brain responsible for judgment and behavior modulation is typically still developing until age 20-30. Teen decision-making skills (as any parent can appreciate) are sometimes not what we would like them to be. In general, teen athletes require more vigilance and direct supervision than our adult clients. It would be challenging to give a teen all the coaching he or she needs in the context of your adult class and still give your adult clients the coaching and attention they need. Whereas, in a teens class all the athletes require a similar amount of supervision and the format of the class is designed around that need.
It is crucial to include lots of activities that challenge the vestibular system in our teens programing due to its impact on development of movement strategies, ability to decrease sports injury risk, and potential influence on cognitive processing. Refer to the FAQ titled “What are the benefits of all the tumbling the kids do in CrossFit Kids classes?” for details and references regarding the importance of vestibular stimulation for kids and teens. In general, adults cannot (or will not) tolerate the amount of vestibular activities that are a standard part of our teens program because we have not continued to challenge our vestibular systems into adulthood (and they have suffered from the disuse). It is a disservice to our teens to prevent them from getting this optimal stimulation.
There is extensive evidence supporting the impact of exercise on cognitive function. See the FAQ titled “Why do kids and teens study after a CrossFit Kids class at an affiliate and why does CrossFit Kids believe so strongly in implementing the program within schools?” for a detailed explanation and reference information on this subject. The CrossFit Kids Teens class structure includes 15-20 minutes of study time built in to the end of each class. This facilitates an opportunity for teens to capitalize on all the biochemical processes that enhance learning ability immediately following exercise versus sending teens home at the end of class and potentially missing that window of opportunity to support academic performance.

Work capacity
Teens, specifically fit teens, have significantly greater work capacity for high-intensity exercise than their middle-aged adult counterparts. Their recovery time is also faster. Because the age range in teens classes is limited to preadolescents and adolescents, there is significantly less moderation in intensity to accommodate older athletes with injury/overuse concerns, especially when considering the increased utilization of impactloading and vestibular activities. For this reason, the CrossFit Kids Teens format allows the more elite high school athletes to be challenged in a way that may or may not be accessible in the context of the adult classes in your gym. On the flip side, deconditioned teens will be placed in an environment that fosters their capacity for more rapid improvements than their adult counterparts and so are less likely to get “lost in the crowd.” A skilled CrossFit Kids trainer will be able to create a supportive environment that meets the needs of both athletes.

Social factors
Maybe the key question is this: When you were 14, who did you want to hang out with—your parents or your friends?
Although safety is our paramount concern, fun is an indispensable component of the CrossFit Kids program across every age group. And quite simply, teens are going to have more fun and be more motivated by working alongside their peers (even if they don’t realize it initially). While it might seem “cool” to a teen to workout with the adults in the gym, their brains operate on a different wavelength. Not to mention there are inherent risks in placing teens in the adult CrossFit environment. The music, state of dress, language, and conversational topics common to and entirely appropriate in your adult classes may not be appropriate for impressionable teenagers. Finally, placing teens in adult class invites the opportunity for an inappropriate relationship between an adult and a minor. In the CrossFit Kids Trainer Course, an entire lecture is dedicated to discussing the potential risks and preventative measures you can take to ensure the safety of the children and teens in your gym.

The bottom line
It is not categorically wrong to train teens within your adult class, but the CrossFit Kids Teen class is designed to meet the specific developmental needs (be it physical, cognitive, or social) of adolescents and allow you as a trainer to optimize the effectiveness of CrossFit intervention with these clients. Why miss out on all the additional benefit or take the risk of possible harm by forcing them to an adult environment?

De Becker G. Protecting the Gift: Keeping Children and Teenagers Safe (and Parents Sane). NY: Dell, 2000.
http://www.amazon.com/Protecting-Gift-Keeping-Children-Teenagers/dp/0440509009

Diseases & Conditions. TeensHealth. Available at http://kidshealth.org/teen/diseases_conditions/#cat20158. Accessed April 12, 2013.

Faigenbaum AD and Myer GD. Pediatric resistance training: Benefits, concerns, and program design considerations. Current Sports Medicine Reports 9(3): 161–168, May/June 2010.
http://www.ncbi.nlm.nih.gov/pubmed/20463500

Henschel A. Effects of age on work capacity. American Industrial Hygiene Association Journal 31(4): 430-436, July-August 1970.
http://www.ncbi.nlm.nih.gov/pubmed/5473752

Pompeiano O and Allum JHJ, eds. Vestibulospinal Control of Posture and Locomotion. Amsterdam, Netherlands: Elsevier Science‬, 1988‬.‬
http://www.amazon.com/VESTIBULOSPINAL-CONTROL-LOCOMOTION-ProgressResearch/dp/0444809767

Stop Sports Injuries. Available at http://www.stopsportsinjuries.org. Accessed April 12, 2013.

 

REGISTERED CROSSFIT KIDS PROGRAMS

Click the Map to find a Registered CrossFit Kids Program in your part of the world.
Registered CrossFit Kids Program search.

Registered CrossFit Kids Programs

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Crazy Wife CrossFit
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Wine Country CrossFit for Kids
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CrossFit Kids San Elijo (Inactive)
CrossFit Kids Windy City
CrossFit Kids Texas
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Natural High CrossFit Kids
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CrossFit Kids Poway
CrossFit Kids Invictus
CrossFit Kids Odyssey
Bulldog CrossFit Kids
CrossFit Kids Rockwall
CrossFit Kids - King of Prussia
CrossFit Kids Southwest Austin (Inactive)
CrossFit Kids - Simi Valley
Flux CrossFit Kids
CrossFit Kids Ayr
CrossFit Kids Ventura (Inactive)
CrossFit Kids Decatur
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Bridger CrossFit Kids
CrossFit and Fearless Kids
CrossFit Kids Bartlett
CrossFit Kids San Rafael
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CrossFit Kids Orange County( currently inactive)
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CrossFit Kids West Seattle
CrossFit Kids Arenal
CrossFit Kids Bloomfield
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CrossFit Kids USA
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CrossFit Kids by CrossFit Xystum
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Glenwood Springs CrossFit Kids
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U R CrossFit Kids
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CrossFit Kids Surge
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CrossFit Kids Steele Creek
The Cell CrossFit Kids
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Guerrilla Fitness Morristown CrossFit Kids
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The Fort CrossFit Kids
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Diablo CrossFit Kids
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Hook & Ladder CrossFit Kids
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Outlier CrossFit Kids
CrossFit Kids Atlanta
The Tank CrossFit Kids Goderich
CrossFit Kids Omnes
CrossFit Kids PB (Inactive)
CrossFit Kids Nittany
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CrossFit Kids 707
CrossFit Kids 307
Reebok CrossFit Kids Enduro
Big Horn CrossFit Kids
CrossFit Kids Beacon
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Prairie CrossFit Kids
CrossFit Kids Lake Mirror
CrossFit Kids Outdoor Fitness
CrossFit Kids Florian
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CrossFit Kids Bel Air
CrossFit Kids 718
CrossFit Kids Cannes
CrossFit Kids Rock Hill
CrossFit Kids Garden City
Westlake CrossFit Kids
CrossFit Kids Henderson
CrossFit Kids Mahopac
Total CrossFit Kids
Dropping Plates CrossFit Kids (Inactive)
CrossFit Kids Hawkes Bay
CrossFit Kids West Petaluma
CrossFit Kids Ipswich
CrossFit Kids MHF
CrossFit Kids Valor
CrossFit Kids Gisborne
CrossFit Kids Texoma
CrossFit Kids Annapolis
CrossFit Kids Virtuosity
CrossFit Kids Stamford
Reebok CrossFit Kids Glevum
CrossFit Kids Scranton
Bodyshop CrossFit Kids West Kelowna
CrossFit Kids 906
CrossFit Kids Lake Charles
CrossFit Kids Shifted
Clear Lake CrossFit Kids
CrossFit Kids Kindred
CrossFit Kids Manassas
Palmetto Bay CrossFit Kids
Agoge CrossFit Kids Woodinville
CrossFit Kids DSP
CrossFit Kids Iron Spider
CrossFit Kids Impavidus
CrossFit Kids Stony Brook
CrossFit Kids Woodbridge
S & S CrossFit Kids
CrossFit Kids Survival
Lahaina CrossFit Kids
CrossFit Kids Monroe
CrossFit Kids Religion
CrossFit Kids Body-Mechanic
CrossFit Kids 508
CrossFit Kids Loganholme
CrossFit Kids Caliber
CrossFit Kids Longevity
I AM CrossFit Kids
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Champlain Valley CrossFit Kids
CrossFit Kids Frontier
CrossFit Kids 910
CrossFit Kids Purgatory
No Mercy CrossFit Kids
CrossFit Kids Beyond Sport
CrossFit Kids Centurion
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Transform CrossFit Kids
CrossFit Kids Blackburn
Reebok CrossFit Kids Nürnberg
Small Town CrossFit Kids
CrossFit Kids Main Line
CrossFit Kids B4C
CrossFit Kids Tameside
CrossFit Kids 14
CrossFit Kids 225
CrossFit Kids Vision
CrossFit Kids Meridian (Inactive)
CrossFit Kids West
CrossFit Kids Creed
RSA CrossFit Kids
CrossFit Kids East Auckland
AJ CrossFit Kids
CrossFit Kids Body and Mind
CrossFit Kids LIVE
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CrossFit Kids 509
Sun Valley CrossFit Kids
Big Mountain CrossFit Kids
CrossFit Kids Boynton Beach
Chino CrossFit Kids
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CrossFit Kids West Springfield
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Whaling City CrossFit Kids
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13 Stripes CrossFit Kids
CrossFit Kids 8-Fifty
Finish Strong CrossFit Kids
CrossFit Kids 1525
CrossFit Kids Jaguar
CrossFit Kids 716
CrossFit Kids Metamorphosis
CrossFit Kids Niceville
CrossFit Kids Mt. Hood
CrossFit Kids Y'all
CrossFit Kids Chipping Norton
CrossFit Kids TriForce
CrossFit Kids Novus
CrossFit Kids Mt. Laurel
CrossFit Kids Great Bridge
CrossFit Kids Manhasset
CrossFit Kids Montgomery
Mountain CrossFit Kids
CrossFit Kids Lanier
CrossFit Kids Pisgah
Mortal CrossFit Kids
CrossFit Kids Oswego
Ole Glory CrossFit Kids
CrossFit Kids Tolero
CrossFit Kids Old Bay
CrossFit Kids Uncompromised
CrossFit Kids Gurnee
Eternity CrossFit Kids
Fidelis CrossFit Kids
CrossFit Kids Fully Involved
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CrossFit Kids Naples
CrossFit Kids Seal Beach
Brickhouse CrossFit Kids
CrossFit Kids Triton
Waypoint CrossFit Kids
CrossFit Kids Eminence
CrossFit Kids The Shelter
CrossFit Kids Tri-County
CrossFit Kids Fanatics
CrossFit Kids Elgin
CrossFit Kids at CrossFit Chronic
CrossFit Kids Limitless
CrossFit Kids Shrewsbury
CrossFit Kids Northern Kentucky
CrossFit Kids Bear
CrossFit Kids Ponte Vedra
CrossFit Kids McPherson YMCA
District CrossFit Kids
CrossFit Kids 760
CrossFit Kids Louisville East
Anchor CrossFit Kids
Circle City CrossFit Kids
CrossFit Kids Dojo
Firebird CrossFit Kids
CrossFit Kids Hilton Head
CrossFit Kids Hollywood
CrossFit Kids Inland Empire
Southern Tier CrossFit Kids
Wellington CrossFit Kids
Mountain Strength CrossFit Kids
CrossFit Kids Inspire
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CrossFit Kids Rebels
CrossFit Kids Wilsonville
Central Bucks CrossFit Kids
Kirkland CrossFit Kids
Power Play CrossFit Kids
CrossFit Kids West Santa Cruz
Patriot CrossFit Kids
CrossFit Kids Remedy

..

CrossFit Kids The Rock
CrossFit Kids Visalia
CrossFit Kids Versus
CrossFit Kids C-Town
CrossFit Kids ASAP
CrossFit Kids Hixson
CrossFit Kids Rebuild
CrossFit Kids 116
CrossFit Kids Grounds
CrossFit Kids Formidable
CrossFit Kids Heroism
CrossFit Kids Power Station
Diamond Hill CrossFit Kids
CrossFit Kids Coppell Central
CrossFit Kids 3120
CrossFit Kids Tehachapi
Wyakin CrossFit Kids
CrossFit Kids 117
CrossFit Kids at CrossFit The Rack
CrossFit Kids FlyOver
Saanich Peninsula CrossFit Kids
CrossFit Kids Unrested Assurance
CrossFit Kids Reebok Firepower
CrossFit Kids Infernal
Maltese CrossFit Kids
CrossFit Kids Stockton
CrossFit Kids Nottingham
CrossFit Kids No Edge
CrossFit Kids Embark
Arena Ready CrossFit Kids
Brampton CrossFit Kids
Yucaipa CrossFit Kids
CrossFit Kids Cypress
Rocket CrossFit Kids
BlackFin CrossFit Kids
Downstate CrossFit Kids
CrossFit Kids Kilgore
CrossFit Kids Passaic Valley
Sonic CrossFit Kids
CrossFit Kids DBN
Reebok CrossFit Kids Durbs
Tiger Mountain CrossFit Kids
CrossFit Kids Illumine
CrossFit Kids F3
CrossFit Kids Family
CrossFit Kids West Ames
CrossFit Kids at Mount CrossFit
CrossFit Kids Wenatchee
CrossFit Kids 199
CrossFit Kids GEO
CrossFit Kids Templum
CrossFit Kids Trent
CrossFit Kids Bull
CrossFit Kids Reebok 5th Ave.
CrossFit Kids at CrossFit Hard
The Gate CrossFit Kids
QTown CrossFit Kids
CrossFit Kids Cimmeria
CrossFit Kids at CutThroat CrossFit
CrossFit Kids at Hammer CrossFit
Fundy CrossFit Kids
CrossFit Kids Shoalhaven
West Atlanta Metro CrossFit Kids
CrossFit Kids BFC
CrossFit Kids J Town
Onward CrossFit Kids
CrossFit Kids Autonomy
Rocktown CrossFit Kids
CrossFit Kids at The Bar CrossFit
CrossFit Kids 5 Star Oz
CrossFit Kids Kanga
CrossFit Kids 7220
CrossFit Kids 7220 West
CrossFit Kids Russellville
CrossFit Kids Port Washington
CrossFit Kids Cool Springs
Alaka'i CrossFit Kids
CrossFit Kids Dexter
CrossFit Kids Asperitas
Duke City CrossFit Kids
CrossFit Kids Confortare
CrossFit Kids Prodigy
CrossFit Kids 614
CrossFit Kids SoFla
CrossFit Kids Postal
CrossFit Kids Patronus
Ironwood CrossFit Kids
CrossFit Kids Port Lincoln
CrossFit Kids Ashburton
Action CrossFit Kids
All Or Nothing CrossFit Kids
Junction City CrossFit Kids
CrossFit Kids Veracity
Myland CrossFit Kids
CrossFit Kids Edmonton
CrossFit Kids Cumbria
CrossFit Kids Athletic Academy
CrossFit Kids Brodie Park
CrossFit Kids Imperial Valley
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CrossFit Kids Willow
CrossFit Kids Link
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York Street CrossFit Kids
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CrossFit Kids Brownsville
CrossFit Kids 377
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StoneWay CrossFit Kids
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FFW CrossFit Kids
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CrossFit Kids Kitchener
MaD CrossFit Kids
CrossFit Kids eXalted
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Far North CrossFit Kids
CrossFit Kids Manukau
CrossFit Kids Sevier
CrossFit Kids XT
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Lift Bridge CrossFit Kids
CrossFit Kids Brendale
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CrossFit Kids CVI
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CrossFit Kids 1889
CrossFit Kids North Fort Collins
CrossFit Kids Vienna
CrossFit Kids DL2 1DL
Ballistix CrossFit Kids Somerset West
CrossFit Kids Palm Harbor
CrossFit Kids Cairo
CrossFit Kids Worthy
Reebok CrossFit Kids Sentinel

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CrossFit Kids MHz
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Odessa CrossFit Kids
CrossFit Kids Brier Creek
CrossFit Kids Finish First
CrossFit Kids Medway
Ridgeline CrossFit Kids
CrossFit Kids Jozi
Bladium CrossFit Kids
CrossFit Kids Ethos
CrossFit Kids at CrossFit Climax
CrossFit Kids 530
CrossFit Kids Stronghold
Jefferson City CrossFit Kids
CrossFit Kids Battle Ready
CrossFit Kids Zachary
CrossFit Kids Marysville
CrossFit Kids Invoke
CrossFit Kids Diamond Valley
Primitive CrossFit Kids
CrossFit Kids 403
Fallout CrossFit Kids
Calibrated CrossFit Kids (Inactive)
CrossFit Kids Fortress
Infused CrossFit Kids
CrossFit Kids Sav-Up
CrossFit Kids at CrossFit Dumbo
Shotgun CrossFit Kids
Advanced Performance CrossFit Kids
Black Flag CrossFit Kids
CrossFit Kids AthletiCo Lake Fort Worth
CrossFit Kids City Line
CrossFit Kids Endemic
CrossFit Kids Magnolia
CrossFit Kids Ulster
Tangletown CrossFit Kids
CrossFit Kids 81611
CrossFit Kids Arvada
CrossFit Kids Proper
CrossFit Kids Unchained
CrossFit Kids Tri-O
CrossFit Kids South Sacramento
Battle CrossFit Kids
CrossFit Kids Hardcore North
CrossFit Kids Ringwood
This is CrossFit Kids
Spa City CrossFit Kids
CrossFit Kids Rosemont
CrossFit Kids Lincoln
CrossFit Kids North Okanagan
CrossFit Kids Athlete Lab
Citizen CrossFit Kids
CrossFit Kids Warrenton
Reebok CrossFit Kids Medfield
CrossFit Kids Spearhead
Kettle Moraine CrossFit Kids
CrossFit Kids Carson Valley
CrossFit Kids 203
CrossFit Kids 151
CrossFit Kids Champaign-Urbana
CrossFit Kids at CrossFit Feel Good
CrossFit Kids Alpharetta
James River CrossFit Kids
CrossFit Kids The Dalles
CrossFit Kids HomeBase
CrossFit Kids Toro Grande
LoCo CrossFit Kids
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CrossFit Kids North Mesquite
CrossFit Kids Bedford
CrossFit Kids Fever
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CrossFit Kids OKM
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Awesome CrossFit Kids
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Dawson CrossFit Kids
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CrossFit Kids Persist
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CrossFit Kids at Predation CrossFit
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CrossFit Kids Oak Creek
Be Challenged CrossFit Kids
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CrossFit Kids Dubbo
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Kings & Queens CrossFit Kids
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CrossFit Kids Optimistic
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CrossFit Kids Boston
CrossFit Kids G Bar 3
CrossFit Kids Battleground (Inactive)
Sherwood CrossFit Kids
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Fit 1 CrossFit Kids
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OV CrossFit Kids
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CrossFit Kids Soul Ruckus
CrossFit Kids Gympie
CrossFit Kids Indian Trail (Inactive)
CrossFit Kids Santiago
CrossFit Kids IV
CrossFit Kids 970
CrossFit Kids Thornton
CrossFit Kids St. Marys
CrossFit Kids A-Game
CrossFit Kids Kalos Sthenos
CrossFit Kids Stapleton
CrossFit Kids Prowess
Spartacus CrossFit Kids
Badlands CrossFit Kids
CrossFit Kids Chatswood
CrossFit Kids Virtus
Calimesa CrossFit Kids
O'Hare CrossFit Kids
CrossFit Kids Cambridge
CrossFit Kids DTW
CrossFit Kids Stompin Ground
CrossFit Kids 1013
CrossFit Kids Reckoning
CrossFit Kids Lake George
CrossFit Kids Unrivaled
San Angelo CrossFit Kids
Centennial CrossFit Kids
CrossFit Kids AZO
South Sound CrossFit Kids
CrossFit Kids CDI
CrossFit Kids Radar
Jefferson State CrossFit Kids
CrossFit Kids Pulse
CrossFit Kids The Shed
CrossFit Kids Danville
CrossFit Kids Credence
CrossFit Kids Mansfield
CrossFit Kids Heartland
CrossFit Kids Willow Glen
CrossFit Kids HVL
CrossFit Kids Ruston
Sweat Factory CrossFit Kids
CrossFit Kids St-Laurent
CrossFit Kids OKM-East
CrossFit Kids Timber
Storm King CrossFit Kids
Dragon CrossFit Kids
CrossFit Kids Springfield
CrossFit Kids Apollo
CrossFit Kids 274
CrossFit Kids Askal
CrossFit Kids West Sacramento
CrossFit Kids Malibu
South Hall CrossFit Kids
CrossFit Kids Salvo
CrossFit Kids City Bowl
CrossFit Kids Gryphon
CrossFit Kids Incendia
CrossFit Kids South Metro
CrossFit Kids Rocks
CrossFit Kids Supremacy
CrossFit Kids Waxahachie
Badger CrossFit Kids
CrossFit Kids Breaux Bridge
CrossFit Kids Tel Aviv
Port City CrossFit Kids
CrossFit Kids Hamptons
Solstice CrossFit Kids (Inactive)
Menesetung CrossFit Kids
CrossFit Kids Intrepid
CrossFit Kids Invasion
Heritage CrossFit Kids
CrossFit Kids Gof Metgot
CrossFit Kids Attain
Vigor CrossFit Kids
CrossFit Kids Victoria
CrossFit Kids Brentwood
CrossFit Kids Memorial Houston
CrossFit Kids Tupelo
Route 33 CrossFit Kids
CrossFit Kids Mesa
CrossFit Kids North Head
CrossFit Kids Intensify
CrossFit Kids Warrenville
CrossFit Kids at CrossFit Deprivation
CrossFit Kids FireBase
Oak City CrossFit Kids
CrossFit Kids Untamed
CrossFit Kids Juggernaut
CrossFit Kids Albuquerque
CrossFit Kids Lift
CrossFit Kids Yellowhammer
CrossFit Kids Coqui
NOVA CrossFit Kids
Strand CrossFit Kids
CrossFit Kids Ripon
Big Sky CrossFit Kids
CrossFit Kids Currie Barracks
CrossFit Kids Fairbanks
CrossFit Kids Aggieland
BodyLab CrossFit Kids
CrossFit Kids Alexandria
CrossFit Kids XY
CrossFit Kids Fort Meyers
Yellowstone CrossFit Kids
IronClad CrossFit Kids
CrossFit Kids Pohaku
CrossFit Kids PAX
CrossFit Kids 516
CrossFit Kids 506
CrossFit Kids-AC
CrossFit Kids Brantford
CrossFit Kids Amundson
CrossFit Kids Caves Beach
CrossFit Kids RedZone
CrossFit Kids 407
Champ City CrossFit Kids
CrossFit Kids Chesapeake
CrossFit Kids Code 3
CrossFit Kids Dinami
CrossFit Kids Eau Claire
CrossFit Kids Falls Church
CrossFit Kids Mozomo
CrossFit Kids Throne
CrossFit Kids Fareham
CrossFit Kids Four Pillars
CrossFit Kids at H.O.T. Side CrossFit
Hurricane CrossFit Kids
CrossFit Kids Cypress
CrossFit Kids Connex
CrossFit Kids Future
Always Forward CrossFit Kids
CrossFit Kids Prestige
CrossFit Kids Spokane Valley
CrossFit Kids Identity
CrossFit Kids In The Bluff
CrossFit Kids Iron Legion
Land Warrior CrossFit Kids
Rocky Point CrossFit Kids
Sammamish CrossFit Kids
CrossFit Kids Elora
CrossFit Kids Hardnox
CrossFit Kids Flushing
Havasu CrossFit Kids
CrossFit Kids To The Core
Mount Vernon CrossFit Kids
CrossFit Kids at CrossFit Burn
CrossFit Kids 859
CrossFit Kids at Pump CrossFit
CrossFit Kids 212
CrossFit Kids Sudbury
Sycamore CrossFit Kids
CrossFit Kids Strongtown
CrossFit Kids RepScheme
CrossFit Kids Grand Strand
CrossFit Kids at CrossFit Rough
CrossFit Kids Lakewood Ranch
North Country CrossFit Kids (inactive)
Ocean State CrossFit Kids
CrossFit Kids Pretoria
CrossFit Kids Salus
CrossFit Kids Tempered
CrossFit Kids Invigorate
CrossFit Kids Belleville
Gator CrossFit Kids
Semper CrossFit Kids
CrossFit Kids Core KTown
Team BSS CrossFit Kids
Gainey Village CrossFit Kids
CrossFit Kids North Pasadena
Heroes CrossFit Kids
CrossFit Kids Williamsburg
CrossFit Kids Warehouse
Upper Cape CrossFit Kids
CrossFit Kids Tracy
Wellness Revolution CrossFit Kids
No Excuses CrossFit Kids
CrossFit Kids Kitsilano
Granite City CrossFit Kids
CrossFit Kids Granbury
CrossFit Kids Helena
CrossFit Kids Reveille
Priority CrossFit Kids
ACME CrossFit Kids
CrossFit Kids Awaken
Golden State CrossFit Kids
Cuyahoga CrossFit Kids
Maritime CrossFit Kids
CrossFit Kids Rowlett
College Hill CrossFit Kids
CrossFit Kids at CrossFit Wild
CrossFit Kids South Okanagan
CrossFit Kids MNL
Wildfire CrossFit Kids
STADD CrossFit Kids
CrossFit Kids Bios
CrossFit Kids 843
CrossFit Kids Abbotsford
CrossFit Kids Zionsville
Kamloops CrossFit Kids
CrossFit Kids Orange NY
CrossFit Kids Plainfield
CrossFit Kids Barrier Reef
CrossFit Kids 2 Serve
CrossFit Kids Intention
B-Fit CrossFit Kids
CrossFit Kids Convergence
CrossFit Kids Friendswood
BARx CrossFit Kids
CrossFit Kids Valdosta
CrossFit Kids UNO
CrossFit Kids Smithtown
CrossFit Kids Fargo
CrossFit Kids Hook'd
72700 CrossFit Kids
CrossFit Kids Blade
CrossFit Kids Boomtown
CrossFit Kids SolaFide
Staten Island CrossFit Kids
CrossFit Kids at CrossFit To The Bone
CrossFit Kids Stacked
CrossFit Kids Southborough
CrossFit Kids Scotts Valley
Monmouth CrossFit Kids
CrossFit Kids Louisville
Calapoola CrossFit Kids
CrossFit Kids Lancaster
CrossFit Kids FPC
CrossFit Kids Glen Burnie
Snake River CrossFit Kids
CrossFit Kids Strong Island
4J's CrossFit Kids
CrossFit Kids Pace Performance
CrossFit Kids Gastonia
CrossFit Kids St. Catharines
Power In Motion CrossFit Kids
CrossFit Kids East London
CrossFit Kids Puyallup
9th Legion CrossFit Kids
CrossFit Kids Douglasville
CrossFit Kids Vertigo
DEKA CrossFit Kids
Mountain Loop CrossFit Kids
CrossFit Kids CM2
CrossFit Kids Zevenhuizen
CrossFit Kids De La Cité
CrossFit Kids No Quarter
CrossFit Kids Waterloo
CrossFit Kids Thunder Hill
Kingman CrossFit Kids
CrossFit Kids Enumclaw
CrossFit Kids at CrossFit Passion
CrossFit Kids NCR
River Parish CrossFit Kids
CrossFit Kids Herriman
CrossFit Kids Bradenton
CrossFit Kids Sting
CrossFit Kids Per Ardua
CrossFit Kids Västkusten
CrossFit Kids 13
CrossFit Kids Odyssey
CrossFit Kids Oulu
AMP CrossFit Kids
CrossFit Kids at CrossFit Hardcore Pompano Beach
CrossFit Kids South Valley
Blue Ash CrossFit Kids
CrossFit Kids Noosa
Reebok CrossFit Kids LAB
CrossFit Kids Drive
CrossFit Kids Assateague
CrossFit Kids Montpellier
CrossFit Kids Never Doubt
CrossFit Kids Frankfort
CrossFit Kids DTR
CrossFit Kids Wash Park
JAB CrossFit Kids
CrossFit Kids Veni Vidi Vici
LifeThyme CrossFit Kids
CrossFit Kids Loft
810 CrossFit Kids
CrossFit Kids Scorch
Saratoga Springs CrossFit Kids
CrossFit Kids Vert
CrossFit Kids Wantage
CrossFit Kids Pampa
T800 CrossFit Kids
CrossFit Kids Kith
CrossFit Kids Silicon Valley
Indian Hills CrossFit Kids
Gulf Shores CrossFit Kids
CrossFit Kids at CrossFit Aces
CrossFit Kids 502
CrossFit Kids A14
CrossFit Kids Dublin
CrossFit Kids Wando
CrossFit Kids Will County
Arbor CrossFit Kids
CrossFit Kids Saltillo
GBE CrossFit Kids
Chalk Bucket CrossFit Kids
Wasatch CrossFit Kids Race
Burn City CrossFit Kids
CrossFit Kids Silos
CrossFit Kids Eagle Rock
Blue Coast CrossFit Kids
ISLA CrossFit Kids
CrossFit Kids Mandeville
CrossFit Kids Central London
CrossFit Kids Metalbox
CrossFit Kids at Get Mean CrossFit
CrossFit Kids 105
CrossFit Kids Delmon
Loudhouse CrossFit Kids
CrossFit Kids Biometrics
CrossFit Kids Hyde Park
CrossFit Kids Chilliwack
CrossFit Kids Castlewood
CrossFit Kids Unlimited Potential
CrossFit Kids 737
CrossFit Kids Exhilarate
CrossFit Kids Giant
CrossFit Kids Alter
CrossFit Kids Hamilton
CrossFit Kids Maelstrom
CrossFit Kids Manitowoc
CrossFit Kids Eastern Ridge
CrossFit Kids Oryx
CrossFit Kids 941
CrossFit Kids Providence
Back Roads CrossFit Kids
CrossFit Kids BLQ
CrossFit Kids Mohawk Valley
Seismic CrossFit Kids
CrossFit Kids Fort Atkinson
CrossFit Kids NIKA
CrossFit Kids 253
CrossFit Kids Belfast
CrossFit Kids Las Rozas
CrossFit Kids Resilience
CrossFit Kids Gantry
CrossFit Kids Lakeland
CrossFit Kids Terre Sainte
CrossFit Kids 45 North
Landing CrossFit Kids
CrossFit Kids Knights
CrossFit Kids Merrick
CrossFit Kids Palm Springs
Crofton CrossFit Kids
CrossFit Kids Royalty
Cape CrossFit Kids
CrossFit Kids North Pacific
CrossFit Kids Stone Age Fuel
Yankee CrossFit Kids
CrossFit Kids HUI
CrossFit Kids SAG
CrossFit Kids Webster
CrossFit Kids Los Altos
CrossFit Kids Kfar Saba
Big Dog CrossFit Kids
CrossFit Kids Kilo
CrossFit Kids Fusion
CrossFit Kids Hydro
CrossFit Kids St. Vrain
W.O.F. CrossFit Kids
CrossFit Kids Max Effort
CrossFit Kids Nouveau
CrossFit Kids Chiang Mai
CrossFit Kids Cogency
Kato CrossFit Kids
CrossFit Kids Adrenaline
CrossFit Kids Yelm
CrossFit Kids MouseTrap
CrossFit Kids Port Orange
CrossFit Kids Lower Town
CrossFit Kids Canmore
CrossFit Kids Mid Mitten
CrossFit Kids Outerlimits
Blended Athletics CrossFit Kids
Gardens CrossFit Kids
CrossFit Kids Colchester
CrossFit Kids COMO
CrossFit Kids Blue Diamond
Britannia CrossFit Kids
CrossFit Kids Radford
CrossFit Kids 609
CrossFit Kids Andover
Rogue Valley CrossFit Kids
CrossFit Kids Eden
MCW CrossFit Kids
CrossFit Kids Yards
Brooklyn CrossFit Kids Columbia Street
CrossFit Kids at CrossFit Contraband
CrossFit Kids Tuusula
CrossFit Kids Hatfield
CrossFit Kids 314
CrossFit Kids Glendale
CrossFit Kids Parker
CrossFit Kids Minotaure
Oroville CrossFit Kids
CrossFit Kids at Maniac CrossFit
CrossFit Kids BrickYard
TFL CrossFit Kids
CrossFit Kids PWA
CrossFit Kids Cannock
CrossFit Kids BEO
CrossFit Kids Holly Springs
CrossFit Kids Critical Mass (inactive)
CrossFit Kids Geraldton
Mission CrossFit Kids San Antonio
CrossFit Kids Jenks
Longhorn CrossFit Kids
Folsom City CrossFit Kids
CrossFit Kids 2232
CrossFit Kids 561
Increased CrossFit Kids
CrossFit Kids Dirigo
CrossFit Kids 57 North
Mid Mountains CrossFit Kids
CrossFit Kids Murray
Ballantyne YMCA CrossFit Kids
CrossFit Kids Niverville
BackCountry CrossFit Kids
F1F CrossFit Kids
CrossFit Kids Newark
CrossFit Kids 4042
CrossFit Kids 424
CrossFit Kids Orillia
CrossFit Kids Hampton Roads
CrossFit Kids LifeForce
CrossFit Kids Milford
CrossFit Kids North Fulton
CrossFit Kids Cuties
Red Dirt CrossFit Kids
CrossFit Kids West Visalia
CrossFit Kids Reflex
Conviction CrossFit Kids
CrossFit Kids Untouchable
CrossFit Kids Syndicate
CrossFit Kids Kalmar
CrossFit Kids Nerd
CrossFit Kids Intense
Our Town CrossFit Kids
Copper City CrossFit Kids
CrossFit Kids Enclave
Strategic CrossFit Kids
Four Rivers CrossFit Kids
Lycan CrossFit Kids
CrossFit Kids at CrossFit Revolver (Inactive)
CrossFit Kids Sparks Elite
Reebok CrossFit Kids 09
CrossFit Kids Cog
Coast Range CrossFit Kids
CrossFit Kids Kuring Gai
CrossFit Kids City View
XS CrossFit Kids
CrossFit Kids 1824
BTS CrossFit Kids
CrossFit Kids Crown City
Windsor CrossFit Kids
CrossFit Kids 816
CrossFit Kids 630
CrossFit Kids South Forney
CrossFit Kids Maple Ridge
CrossFit Kids Morgantown
CrossFit Kids 830 Kerr
CrossFit Kids Burke
Shackle Island CrossFit Kids
Nepean CrossFit Kids
CrossFit Kids Brawn
Dignified CrossFit Kids
CrossFit Kids Stealth
CrossFit Kids Stealth 2
Playalinda CrossFit Kids
CrossFit Kids 110
CrossFit Kids Countdown
Broward CrossFit Kids
CrossFit Kids Rockland
CrossFit Kids Collinsville
CrossFit Kids at CrossFit Bonedale
CrossFit Kids Tucker
CrossFit Kids 623
CrossFit Kids Lividum
Travail CrossFit Kids
CrossFit Kids Quake
CrossFit Kids 333 (Inactive)
CrossFit Kids Wired
Chatham CrossFit Kids
CrossFit Kids St Kilda
CrossFit Kids Jungle Gym
Source CrossFit Kids
CrossFit Kids Iron Horse
CrossFit Kids Mercer
CrossFit Kids Conversion
CrossFit Kids Hard Knox
CrossFit Kids PR Star
CrossFit Kids NE Georgia

NPO CFK registered programs

Steve's Club Camden
CrossFit Kids Arden Hills Swim
CrossFit Kids Sri Ram Ashram

Schools - Registered Programs

Buff Class CrossFit Kids
CrossFit Kids Huskies
Dawson County Schools
CrossFit Kids Sawmill
CrossFit Kids MPS (Milwaukee Public Schools)
Ocelot CrossFit Kids Ecole Okotoks Junior High
Empower Charter School CrossFit Kids
Esperanza CrossFit Kids - Esperanza High School
Palm Valley CrossFit Kids- MWPV School
Camino Nuevo CrossFit Kids- CNCA Middle School
CrossFit Kids JHawk Fitness -Cedar Rapids Thomas Jefferson Senior High
CrossFit Kids Inspiration- Savannah Christian Prep Middle School
CrossFit Kids Waratah Campus
MTHS Hawks CrossFit Kids -Mountlake Terrace High School
Wiseburn CrossFit Kids- R.H. Dana Middle School
CrossFit Kids Cognition-Zurich International School
CrossFit Kids Draco - Bioscience HS
Noble Street CrossFit Kids
CrossFit Kids Del Campo
SJP CrossFit Kids- St. Johns Preparatory School
T-Wolves CrossFit Kids- Mission Vista High School
NSEE CrossFit Kids- North and South Esk Elementary
SCCS CrossFit Kids- Sandhills Classical Christian School
Colts CrossFit Kids- Edward Harris, Jr. Middle School
CCS CrossFit Kids- Christ Community School
Flyers CrossFit Kids- Chaminade High School
CrossFit Kids Spring Creek- Spring Creek Middle School
CrossFit Kids ACS - Ascension Catholic School
Kenai Central High School CrossFit Kids
Paul Kane CrossFit Kids

Military/Club Programs

Centurion CrossFit Kids Fort Hood
Checkertail CrossFit Kids- Tyndall AFB