Although much of what we understand about the stimulus of resistance exercise has been gained by exploring the responses of adults to various training protocols, research into the effects of resistance exercise on children and adolescents has increased over the past decade. Despite outdated concerns that resistance training was ineffective or unsafe for youth, research increasingly suggests that resistance training can be a safe and effective method of exercise for children and adolescents provided that appropriate training guidelines are followed. In addition to enhancing motor skills and sports performance, regular participation in a youth resistance training program has the potential to positively influence several measurable indices of health. It helps strengthen bone, facilitate weight control, enhance psychosocial well-being, and improve one's cardiovascular risk profile. Furthermore, a stronger musculoskeletal system will enable boys and girls to perform life's daily activities with more energy and vigor and may increase a young athlete's resistance to sports-related injuries. Along with other types of physical activity, a properly designed youth resistance training program can offer observable health value to children and adolescents when appropriately prescribed and supervised.
Strong W. , Malina R. , Blimkie C. , et al. Evidence based physical activity for school-age youth . J Pediatr.2005;46: 732-737 .
2.
US Department of Health and Human Services, US Department of Agriculture.Dietary guidelines for Americans. Available at: http://www.healthierus.gov/dietaryguidelines. Accessed June 1, 2005.
3.
Raitakari O. , Porkka K. , Taimela S. , et al. Effects of persistent physical activity and inactivity on coronary risk factors in children and young adults: the Cardiovascular Risk in Young Finns Study . Am J Epidemiol.1994;40: 195-205 .
4.
Telama R. , Yang X. , Viikari, J. , et al. Physical activity from childhood to adulthood: a 21 year tracking study . Am J Prev Med.2005;28: 267-273 .
5.
Blimkie C.Resistance training during pre-adolescence: issues and controversies . Sports Med.1993;15: 389-407 .
6.
Faigenbaum A. , Kraemer W. , Cahill B. , et al.Youth resistance training: position statement paper and literature review . Strength Cond J.1996; 18: 62-75 .
7.
Falk B. , Tenenbaum G.The effectiveness of resistance training in children: a meta-analysis . Sports Med.1996;22: 176-186 .
8.
Guy J. , Micheli L.Strength training for children and adolescents . J Am Acad Orthop Surg.2001;9: 29-36 .
9.
Graves J , Franklin B , eds. Resistance Training for Health and Rehabilitation. Champaign, Ill: Human Kinetics ; 2001.
10.
Micheli L.Preventing injuries in sports: what the team physician needs to know. In: Chan K , Micheli L , Smith A , Rolf C , Bachl N , Frontera W , Alenabi T , eds. F.I.M.S. Team Physician Manual. 2nd ed. Hong Kong: CD Concept ; 2006:555-572.
11.
Parkkari J. , Kujala U. , Kannus P.Is it possible to prevent sports injuries?Sports Med.2001;31: 985-995 .
12.
Grunbaum J. , Kann L. , Kinchen S. , et al. Youth risk behavior surveillance—United States 2003 . MMWR Morb Mortal Wkly Rep.2004 ;53(SS-2): 1-95 .
13.
National Association for Sport and Physical Education.Physical Education for Lifelong Fitness. 2nd ed. Champaign, Ill: Human Kinetics ; 2005.
14.
US Department of Health and Human Services.The Surgeon General's Call to Action to Prevent and Decrease Overweight and Obesity 2001. Washington, DC: US Department of Health and Human Services, Public Health Service, Office of the Surgeon General ; 2001.
15.
American Academy of Pediatrics.Strength training by children and adolescents . Pediatrics . 2001;107: 1470-1472 .
16.
American College of Sports Medicine.ACSM's Guidelines for Exercise Testing and Prescription. 7th ed. Philadelphia, Pa: Lippincott Williams & Wilkins ; 2006:237-251.
17.
British Association of Exercise and Sport Sciences.BASES position statement on guidelines for resistance exercise in young people . J Sports Sci.2004 ;22: 383-390 .
18.
Faigenbaum A.Youth resistance training . President's Council on Physical Fitness and Sports Research Digest. 2003;4: 1-8 .
19.
Hamill B.Relative safety of weight lifting and weight training . J Strength Cond Res.1994;8: 53-57 .
20.
Faigenbaum A. , Westcott W. , Loud R. , Long C.The effects of different resistance training protocols on muscular strength and endurance development in children . Pediatrics. 1999;104: e5 .
21.
Faigenbaum A. , Zaichkowsky L. , Westcott W. , et al. The effects of a twice per week strength training program on children . Pediatr Exerc Sci.1993;5: 339-346 .
22.
Lillegard W. , Brown E. , Wilson D. , et al. Efficacy of strength training in prepubescent to early postpubescent males and females: effects of gender and maturity . Pediatr Rehabil. 1997;1: 147-157 .
23.
Ramsay J. , Blimkie C. , Smith K. , et al. Strength training effects in prepubescent boys . Med Sci Sports Exerc.1990;22: 605-614 .
24.
Weltman A. , Janney C. , Rians K. , et al. The effects of hydraulic resistance strength training in pre-pubertal males . Med Sci Sports Exerc.1986;18: 629-638 .
25.
Pfeiffer R. , Francis R.Effects of strength training on muscle development in prepubescent, pubescent and postpubescent males . Phys Sports Med.1986;14: 134-143 .
26.
Falk, B. , Eliakim A.Resistance training, skeletal muscle and growth. PediatrEndocrinol Rev. 2003;1: 120-127 .
27.
Bass S.The prepubertal years: a uniquely opportune stage of growth when the skeleton is most responsive to exercise?Sports Med.2000;39: 73-78 .
28.
Turner C. , Robling A.Designing exercise regimens to increase bone strength . Exerc Sport Sci Rev. 2003;31: 45-50 .
29.
Vicente-Rodriguez G.How does exercise affect bone development during growth?Sports Med.2006 ;36: 561-569 .
30.
Malina R. , Bouchard C. , Bar-Or O.Growth, Maturation and Physical Activity. Champaign, Ill : Human Kinetics ; 2004.
31.
Heinonen A. , Sievanen H. , Kannus P. , et al. High-impact exercise and bones of growing girls: a 9-month controlled trial . Osteoporos Int.2000;11: 1010-1017 .
32.
Seeman E. , Hopper J. , Bach L. , et al. Reduced bone mass in daughters of women with osteoporosis . N Engl J Med.1989;320: 554-558 .
33.
Pietrobelli A. , Faith MS , Wang J. , Brambilla P. , Chiumello G. , Heymsfield SBAssociation of lean tissue and fat mass with bone mineral content in children and adolescents . Obes Res.2002;10: 56-60 .
34.
Witzke K. , Snow C.Lean body mass and leg power best predict bone mineral density in adolescent girls . Med Sci Sports Exerc.1999;1: 1558-1563 .
35.
Rauch F. , Bailey D. , Baxter-Jones A. , et al. The “muscle-bone” unit during the pubertal growth spurt . Bone. 2004;34: 771-775 .
36.
Conroy B. , Kraemer W. , Maresh C. , et al. Bone mineral density in elite junior Olympic weightlifters . Med Sci Sports Exerc. 1993;5: 1103-1109 .
37.
Virvidakis K. , Georgiou E. , Korkotsidis A. , et al. Bone mineral content of junior competitive weightlifters . Int J Sports Med.1990;11: 244-246 .
38.
Linden C. , Ahlborg H. , Besjakov J. , et al. A school curriculum-based exercise program increases bone mineral accrual and bone size in prepubertal girls: two-year data from the pediatric osteoporosis prevention (POP) study . J Bone Miner Res.2006;21: 829-835 .
39.
MacKelvie K. , Petit M. , Khan K. , et al. Bone mass and structure and enhanced following a 2-year randomized controlled trial of exercise in prepubertal boys . Bone.2004;34: 755-764 .
40.
McKay H. , Maclean L. , Petit M. , et al. 2005. “ Bounce at the Bell”: a novel program of short bouts of exercise improves proximal femur bone mass in early pubertal children . Br J Sports Med.2005;39: 521-526 .
41.
Morris F. , Naughton G. , Gibbs J. , et al. Prospective ten-month exercise intervention in premenarcheal girls: positive effects on bone and lean mass . J Bone Miner Res.1997;12: 1453-1462 .
42.
Valdimarsson O. , Linden C. , Johnell O. , et al. Daily physical education in the school curriculum in prepubertal girls during 1 year is followed by an increase in bone mineral accrual and bone width: data from the prospective controlled Malmo Pediatric Osteoporosis Prevention Study . Calcif Tissue Int.2006;78: 65-71 .
43.
Volek J. , Gomez A. , Scheett T. , et al. Increasing fluid milk intake favorably affects bone mineral density responses to resistance training in adolescent boys . J Am Diet Assoc.2003;103: 1353-1356 .
44.
Specker B.Evidence of an interaction between calcium intake and physical activity on changes in bone mineral density . J Bone Miner Res.1996;11: 1539-1544 .
45.
Gustavsson A. , Olsson T. , Nordstrom P.Rapid loss of bone mineral density of the femoral neck after cessation of ice hockey training: a 6 year longitudinal study in males . J Bone Miner Res.2003;18: 1964-1969 .
46.
Hawkins S. , Schroeder E. , Wiswell R. , et al. Eccentric muscle action increases sitespecific osteogenic response . Med Sci Sports Exerc.1999;31: 1287-1292 .
47.
Blimkie C. , Rice S. , Webber C. , et al. Effects of resistance training on bone mineral content and density in adolescent females . Can J Physiol Pharmacol.1996;74: 1025-1033 .
48.
Burr D. , Robling A. , Turner C.Effects of biomechanical stress on bones in animals . Bone . 2002;30: 781-786 .
49.
Ogden C. , Carrol L. , McDowell M. , et al. Prevalence of overweight and obesity in the United States, 1999-2004 . JAMA. 2006;295: 1549-1555 .
50.
Dietz W.Overweight in childhood and adolescence . N Engl J Med.2004;350; 855-857 .
51.
Guo S. , Chumlea W.Tracking of body mass index in children in relation to overweight in adulthood . Am J Clin Nutr.1999;70(suppl): 145S-148S .
52.
Narayan K. , Boyle J. , Thompson T. , et al. Lifetime risk for diabetes mellitus in the United States . J Am Med Assoc.2003;290: 1884-1890 .
53.
Dencker M. , Thorsson O. , Karlsson M. , et al. Daily physical activity related to body fat in children aged 8-11 years . J Pediatr. 2006;149: 38-42 .
54.
Gillis L. , Kennedy L. , Bar-Or O.Overweight children reduce their activity levels earlier in life than healthy weight children . Clin J Sport Med.2006;16: 51-55 .
55.
American Dietetic Association.Position of the American Dietetic Association: individual-, family-, school-, and community-based interventions for pediatric overweight . J Am Diet Assoc.2006;106: 925-945 .
56.
Siegal J. , Camaione D. , Manfredi T.The effects of upper body resistance training in prepubescent children . Pediatr Exerc Sci.1989;1: 145-154 .
57.
Sothern M.Exercise as a modality in the treatment of childhood obesity . Pediatr Clin North Am.2001;48: 995-1015 .
58.
Sothern M. , Loftin J. , Udall R. , et al. Safety, feasibility and efficacy of a resistance training program in preadolescent obese youth . Am J Med Sci.2000;319: 370-375 .
59.
Watts K. , Beye P. , Siafarikas A. , et al. Exercise training normalizes vascular dysfunction and improves central adiposity in obese adolescents . J Am Coll Cardiol.2004;43: 1823-1827 .
60.
Watts K. , Jones T. , Davis E. , et al. Exercise training in obese children and adolescents . Sports Med.2005;35: 375-392 .
61.
Treuth M. , Hunter G. , Figueroa-Colon R. , et al. Effects of strength training on intra-abdominal adipose tissue in obese prepubertal girls . Med Sci Sports Exerc.1998;30: 1738-1743 .
62.
Treuth M. , Hunter G. , Pichon C. , et al. Fitness and energy expenditure after strength training in obese prepubertal girls . Med Sci Sports Exerc.1998 ;30: 1130-1136 .
63.
Celermajer D. , Sorensen K. , Gooch V. , et al. Non-invasive detection of endothelial dysfunction in children and adults at risk of atherosclerosis . Lancet. 1992;340: 1111-1115 .
64.
Shabi G. , Cruz M. , Ball G. , et al. Effects of resistance training on insulin sensitivity in overweight Latino adolescent males . Med Sci Sports Exerc.2006;38: 1208-1215 .
65.
Falk B. , Sadres E. , Constantini N. , et al. The association between adiposity and the response to resistance training among pre- and early-pubertal boys . J Pediatr Endocrinol Metab. 2002;15: 597-606 .
66.
Micheli L. , Glassman R. , Klein M.The prevention of sports injuries in youth . Clin Sports Med.2000;19: 821-834 .
67.
Drawer F. , Fuller C.Propensity for osteoarthritis and lower limb joint pain in retired professional soccer players . Br J Sports Med.2001;35: 402-408 .
68.
Grimmer K. , Jones D. , Williams J.Prevalence of adolescence injury from recreational exercise: an Australian perspective . J Adolesc Health. 2000;27: 266-272 .
69.
Smith A. , Andrish J. , Micheli L.The prevention of sports injuries of children and adolescents . Med Sci Sports Exerc.1993;25(suppl): 1-7 .
70.
Emery C. , Meeuwisse W. , McAllister J.Survey of sport participation and sport injury risk in Calgary and area high schools . Clin J Sport Med.2006;16: 20-26 .
71.
Malina R. , Morano P. , Barron M. , et al. Incidence and player risk factors for injury in youth football . Clin J Sports Med.2006;16: 214-222 .
72.
Stone M.Implications for connective tissue and bone remodeling alterations resulting from resistance training . Med Sci Sports Exerc.1988;20: S162-S168 .
73.
Stone M.Muscle conditioning and muscle injuries . Med Sci Sports Exerc.1990;22: 457-462 .
74.
Cahill B. , Griffith E.Effect of preseason conditioning on the incidence and severity of high school football knee injuries . Am J Sports Med.1978 ;6: 180-184 .
75.
Dominguez R.Shoulder pain in age group swimmers. In: Erikkson B , Furberg B , eds. Swimming Medicine IV. Baltimore, Md: University Park Press ; 1978:105-109.
76.
Heidt R. , Swetterman L. , Carlonas R. , et al. Avoidance of soccer injuries with preseason conditioning . Am J Sports Med.2000;28: 659-662 .
77.
Hejna W. , Rosenberg A. , Buturusis D. , et al. The prevention of sports injuries in high school students through strength training . National Strength and Conditioning Association Journal. 1982;4: 28-31 .
78.
Hewett T. , Linderfeld T. , Riccobene J. , Noyes F.The effect of neuromuscular training on the incidence of knee injury in female athletes . Am J Sports Med.1999;27: 699-705 .
79.
Mandelbaum B. , Silvers H. , Watanabe D. , et al. Effectiveness of a neuromuscular and proprioceptive training program in preventing anterior cruciate ligament injuries in female athletes . Am J Sports Med.2005;33: 1003-1010 .
80.
Wedderkopp N. , Kaltoft B. , Lundgaard M. , et al. Prevention of injuries in young female players in European team handball: a prospective intervention study . Scand J Med Sci Sports. 1999;9: 41-47 .
81.
Hoffman J. , Kang J. , Faigenbaum A. , et al. Recreational sports participation is associated with enhanced physical fitness in children. ResSports Med.2005;13: 149-161 .
82.
De Loes M. , Dahlstedt J. , Thomee R.A 7-year study on risks and costs of knee injuries in male and female youth participants in 12 sports . Scand J Med Sci Sports.2000;10: 90-97 .
83.
Fry A. , Kraemer W.Resistance exercise overtraining and overreaching . Sports Med.1997;23: 106-129 .
84.
Sorof J. , Daniels S.Obesity hypertension in children: a problem of epidemic proportions . Hypertension. 2002;40: 441-447 .
85.
Hagberg J. , Ehsani A. , Goldring D. , et al. Effect of weight training on blood pressure and hemodynamics in hypertensive adolescents . J Pediatr.1984 ;104: 147-151 .
86.
Ewart C. , Young D. , Hagberg J.Effects of school-based aerobic exercise on blood pressure in adolescent girls at risk for hypertension . Am J Public Health.1998;88: 949-951 .
87.
Fripp R. , Hodgson J.Effect of resistive training on plasma lipid and lipoprotein levels in male adolescents . J Pediatr.1987; 111: 926-931 .
88.
Weltman A. , Janney C. , Rians C. , et al. Effects of hydraulic-resistance strength training on serum lipid levels in prepubertal boys . Am J Dis Child.1987;141: 777-780 .
89.
Rians C. , Weltman A. , Cahill, B. , et al. Strength training for prepubescent males: is it safe?Am J Sports Med.1987;15: 483-489 .
90.
Westcott W.A new look at youth fitness . Am Fitness Q.1992;11: 16-19 .
91.
Tucker L.Effect of weight training on self-concept: a profile of those influenced most . Res Q Exer Sport. 1983;54: 389-397 .
92.
Tucker L.Effect of weight training on body attitudes: who benefits most?J Sports Med.1987;27: 70-78 .
93.
Holloway J. , Beuter A. , Duda J.Self-efficacy and training in adolescent girls . J Appl Soc Psychol.1988;18: 699-719 .
94.
Annesi J. , Westcott W. , Faigenbaum A. , et al. Effects of a 12-week physical activity protocol delivered by YMCA after-school counselors (Youth Fit for Life) on fitness and self-efficacy changes in 5-12 year old boys and girls . Res Q Exerc Sport . 2005;76: 468-476 .
95.
Faigenbaum A. , Zaichkowsky L. , Westcott W. , et al. Psychological effects of strength training on children . J Sport Behav. 1997;20: 164-175 .
96.
Sadres E. , Eliakim A. , Constantini N. , Lidor R. , Falk B.The effect of long-term resistance training on anthropometric measures, muscle strength, and self-concept in pre-pubertal boys . Pediatr Exerc Sci.2001;13: 357-372 .
97.
Dishman R. , Motl R. , Saunders R. , et al. Enjoyment mediates effects of a school-based physical-activity intervention . Med Sci Sports Exerc.2005;37: 478-487 .
98.
Chu D. , Faigenbaum A. , Falkel J.Progressive Plyometrics for Kids . Monterey, Calif : Healthy Learning; 2006.
99.
Faigenbaum A. , Westcott W.Strength and Power for Young Athletes. Champaign, Ill: Human Kinetics ; 2000.
100.
Kraemer W. , Fleck S.Strength Training for Young Athletes. 2nd ed. Champaign, Ill: Human Kinetics ; 2005.
101.
Knudson D. , Magnusson P. , McHugh M.Current issues in flexibility fitness . President's Council on Physical Fitness and Sports Research Digest.2000;3: 1-8 .
102.
Thacker S. , Gilchrist J. , Stroup D. , Kimsey C.The impact of stretching on sports injury risk: a systematic review of the literature . Med Sci Sports Exerc.2004;36: 371-378 .
Robbins D.Postactivation potentiation and its practical application: a brief review . J Strength Cond Res.2005;19: 453-458 .
105.
Faigenbaum A. , Bellucci M. , Bernieri A. , Bakker B. , Hoorens K.Acute effects of different warm-up protocols on fitness performance in children . J Strength Cond Res.2005;19: 376-381 .
106.
Faigenbaum AD , Kang J. , McFarland J. , et al. Acute effects of different warm-up protocols on anaerobic performance in teenage athletes . Pediatr Exerc Sci.2006;17: 64-75 .
107.
Siatras T. , Papadopoulos G. , Mameletzi D. , Gerodimos V. , Kellis S.Static and dynamic acute stretching effect on gymnasts' speed in vaulting . Pediatr Exerc Sci.2003;15: 383-391 .
108.
Olsen O. , Myklebust G. , Engebretsen L. , Holme I. , Bahr R.Exercises to prevent lower limb injuries in youth sports: cluster randomized controlled trial . Br Med J.2005;330: 449 .
109.
Faigenbaum A. , McFarland J.Guidelines for implementing a dynamic warm-up for physical education . J Phys Ed Rec Dance.2007:78: 25-28 .
110.
Campos G. , Luecke T. , Wendeln H. , et al. Muscular adaptations in response to three different resistance training regimens: specificity of repetition maximum training zones . Eur J Appl Physiol.2002;88: 50-60 .
111.
Faigenbaum A. , Milliken L. , Moulton L. , Westcott W.Early muscular fitness adaptations in children in response to two different resistance training regimens . Pediatr Exerc Sci.2005;17: 237-248 .
112.
Faigenbaum A. , Milliken L. , Cloutier G. , et al. Perceived exertion during resistance exercise in children . Percept Mot Skills. 2004;98: 627-637 .
113.
Rhea M. , Alvar B. , Burkett L. , et al. A meta-analysis to determine the dose response for strength development . Med Sci Sports Exerc.2003;35: 456-464 .
114.
Kraemer W. , Adams K. , Cafarelli E. , et al. Progression models in resistance training for healthy adults . Med Sci Sports Exerc.2002;34: 364-380 .
115.
Faigenbaum A. , Milliken L. , LaRosa Loud R. , et al. Comparison of 1 and 2 days per week of strength training in children . Res Q Exerc Sport.2002;73: 416-424 .
