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The Effectiveness of Resistance Training in Children

A Meta-Analysis

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Abstract

Many recent studies have reported that resistance training can be effective in producing strength gains among prepubescents. These studies appear to refute the early claims of ineffectiveness of resistance training in children.

A meta-analysis procedure combines the results of individual empirical studies and estimates a standardised effect, termed effect size. This effect size is based on the scores of the control and experimental groups before and after training. It defines the difference between the gain of the experimental and control groups, divided by the standard deviation of the pooled variances of both groups.

A literature search revealed 28 studies which described a resistance training programme for girls and boys under the age of 12 and 13 years, respectively. Presumably, these children were pre- or early-pubescents. However, only 9 of these studies provided the necessary data to calculate the effect size and could be included in the analysis. The majority of the studies showed a gain in strength between 13 and 30%. The overall mean effect size was found to be 0.57. This signifies that following training, the average child in the resistance training group was above 71.6% of the children in the control group.

The effectiveness of resistance training can be influenced by factors such as age and maturation, gender, as well as the frequency, duration and intensity of the training programme. The studies included in the analysis examined participants of varying ages and did not demonstrate a clear influence of age. Most studies examined only boys or a mixed group of boys and girls. Therefore, the influence of gender on the effectiveness of resistance training in prepubescents cannot yet be determined. Nevertheless, in the few studies where boys and girls were examined separately, no difference was found in the effect of resistance training between genders. It appears that a training frequency of twice per week is sufficient to induce strength gains in children. However, the minimal, or for that matter optimal, duration and intensity are not clear.

Some of the weaknesses observed in the reviewed studies include: (i) the lack of control for a possible learning effect; (ii) non-randomisation into the training and control groups; (iii) no report of adherence rate; (iv) a reliance on boys as study participants; and (v) too little information on the type, volume and intensity of training. Future studies should take these weaknesses into consideration.

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References

  1. Blimkie CJR. Resistance training during pre- and early puberty: efficacy, trainability, mechanisms, and persistence. Can J Sport Sci 1992; 17: (264–79)

    PubMed  CAS  Google Scholar 

  2. Blimkie CJR. Resistance training during preadolescence: issues and controversies. Sports Med 1993; 15: (389–407)

    Article  PubMed  CAS  Google Scholar 

  3. Sale DG. Strength training in children. In: Gisolfi CV, Lamb DR, editors. Perspectives in exercise science and sports medicine. Vol. 2. Youth, exercise and sport. Indianapolis: Benchmark Press, 1989: 165–222

    Google Scholar 

  4. Macera CA, Wooten W. Epidemiology of sports and recreation injuries among adolescents. Phys Educ Sport 1994; 6: (424–33)

    Google Scholar 

  5. Hamill BP. Relative safety of weightlifting and weight training. J Strength Cond Res 1994; 8: (53–7)

    Google Scholar 

  6. Micheli LJ. The incidence of injuries in children’s sports: a medical perspective. In: Brown EW, Branta CE, editors. Competitive sports for children and youth. Champaign: Human Kinetics Publishers, 1988: 99–105

    Google Scholar 

  7. American Academy of Pediatrics. Weight training and weight lifting: information for the pediatrician. Physician Sports Med 1983; 11: (157–61)

    Google Scholar 

  8. Kirsten G. Der Einfluss isometrischen Muskeltrainings auf die Entwicklung der Muskelkraft Jugendlicher Internationale Zeitschrift für Angewandte Physiologie Einschliesslich. Argbeitsphysiologie 1963; 19: (387–402)

    CAS  Google Scholar 

  9. Vrijens J. Muscle strength development in the pre- and post-pubescent age. Med Sport 1978; 11: (152–8)

    Google Scholar 

  10. Docherty D, Wenger HA, Collis ML, Quinney HA. The effects of variable speed resistance training on strength development in prepubertal boys. J Hum Mov Stud 1987; 13: (377–82)

    Google Scholar 

  11. Ban-Pillarelia D. Effects of combined step aerobic and resistance training in children on cardiorespiratory endurance and strength [abstract]. 9th Annual Meeting of the American Society for Pediatric Exercise Medicine: 1994 Aug 11–14: Pittsburgh (PA). Ped Exerc Sci 1995; 7: (218–9)

    Google Scholar 

  12. Blanksby B, Gregor J. Anthropométrie, strength and physiological changes in male and female swimmers with progressive resistence training. Aust J Sport Sci 1981; 1: (3–6)

    Google Scholar 

  13. Clarke DH, Vaccaro P, Andresen NM. Physiological alterations in 7- to 9-year-old boys following a season of competitive wrestling. Res Q Exerc Sport 1984; 55: (318–22)

    Google Scholar 

  14. Duffner B. The trainability of maximal strength during childhood [in German]. Zulassungsarbeit für das Lehramt. Freiburg: Sportwissenschaftliches Institut der Universität Freiburg, 1984 (cited in Mersch and Stoboy, 1989)

    Google Scholar 

  15. Faigenbaum AD, Zaichkowsky LD, Westcott WL, et al. The effect of a twice-a-week strength training program on children. Pediatr Exerc Sci 1993; 5: (339–46)

    Google Scholar 

  16. Faigenbaum A, Westcott WL, Micheli L, et al. The effects of strength training and detraining on children. Med Sci Sports Exerc 1995; Suppl. 27: S115

    Google Scholar 

  17. Falk B, Mor G. The effects of resistance and martial arts training in 6- to 8-year-old boys. Pediatr Exerc Sci 1996; 8: (48–56)

    Google Scholar 

  18. Grimm D, Raede H. Successful application of circuit training in the third class [in German]. Theor Prax Korperkult 1967; 16: (333–42) (cited in Vrijens, 1978)

    Google Scholar 

  19. Hettinger TH. Die trainierbarkeit menschlicher Muskein in Abhangigkeit vom Alter und Aesfchlecht, Internationale Zeitschrift für angewandte Physiologie Einschliesslich. Arbeitsphysiologie 1958; 17: (371–7)

    CAS  Google Scholar 

  20. Isaacs LD, Pohlman RL. Specificity of strength training modes in prepubescent females. Med Sci Sports Exerc 1995; 27 Suppl.: S180

    Google Scholar 

  21. McGovern MB. Effects of circuit weight training on the physical fitness of prepubescent children [abstract]. Diss Abstr Int 1984; 45: (452)A-3A

    Google Scholar 

  22. Mersch F, Stoboy H. Strength training and muscle hypertrophy in children. In: Oseid S, Carlsen KH, editors. International series on sports sciences. Children and exercise XIII. Champaign (IL): Human Kinetics Publishers, 1989: 165–92

    Google Scholar 

  23. Messmer A. The influence of motor ability on shot putting and the educational progress at the beginner level [in German]. Zulassungsarbeit für das Lehramt. Freiburg: Sportwissenschaftliches Institut der Universität Freiburg, 1984 (cited in Mersch and Stoboy, 1989)

    Google Scholar 

  24. Noack H. Fluctuation of performance ability of women during the menstrual cycle and the different athletic talent of the sexes [in German]. Theorie Praxis Körperkultur 1956; 5: (885) (cited in Vrijens, 1978)

    Google Scholar 

  25. Nielsen B, Nielsen K, Behrendt Hansen M, et al. Training of ‘functional muscular strength’ in girls 7–19 years old. In: Berg K, Eriksson BO, editors. Children and exercise IV. Champaign (IL): Human Kinetics, 1980: 69–78

    Google Scholar 

  26. Ozmun JC, Mikesky AE, Surburg PR. Neuromuscular adaptations following prepubescent strength training. Med Sci Sports Exerc 1994; 26: (510–4)

    PubMed  CAS  Google Scholar 

  27. Pfieffer RD, Francis RS. Effects of strength training on muscle development in prepubescent, pubescent, and postpubescent males. Physician Sports Med 1986; 14: (134–43)

    Google Scholar 

  28. Ramsay JA, Blimkie CJR, Smith K, et al. Strength training effects in prepubescent boys. Med Sci Sports Exerc 1990; 22: (605–14)

    Article  PubMed  CAS  Google Scholar 

  29. Rians CB, Weltman AW, Cahill BR, et al. Strength training for prepubescent males: is it safe? Am J Sports Med 1987; 15: 483–9

    Article  PubMed  CAS  Google Scholar 

  30. Rohmert W. Rechts-Links-Vergleich bei isometrischen Armmuskeltraining mit verschiedenem Trainingsreiz bei achtjahrigen Kindern. International Zeitschrift für Angewandte. Physiol Einschl Arbeitsphysiol 1968; 26: (363–93)

    CAS  Google Scholar 

  31. Sailors M, Berg K. Comparison of responses to weight training in pubescent boys and men. J Sports Med 1987; 27: (30–6)

    CAS  Google Scholar 

  32. Servedio FJ, Bartels RL, Hamlin RL, et al. The effects of weight triaining, using Olympic style lifts, on various physiological variables in pre-pubescent boys. Med Sci Sports Exerc 1985; 17: (288)

    Google Scholar 

  33. Sewall L, Micheli LJ. Strength training for children. J Pediatr Orthop 1986; 6: (143–6)

    Article  PubMed  CAS  Google Scholar 

  34. Siegel JA, Camaione DN, Manfredi TG. The effects of upper body resistance training on prepubescent children. Pediatr Ex-erc Sci 1989; 1: (145–54)

    Google Scholar 

  35. Stahle SD, Roberts SO, Davis B, et al. Effect of a 2 versus 3 times per week weight training program in boys aged 7 to 16 [abstract no. 648]. Med Sci Sports Exerc 1995; 27 Suppl.: S114

    Google Scholar 

  36. Weltman A, Janny C, Rians CB, et al. The effects of hydraulic resistance strength training in pre-pubertal males. Med Sci Sports Exerc 1986; 18: (629–38)

    PubMed  CAS  Google Scholar 

  37. Westcott WL. Female response to weight training. J Phys Educ 1979; 77: (31–3)

    Google Scholar 

  38. Cohen J. Statistical power analysis for the behavioral sciences. 2nd ed. Hillsdale: Lawrence Erlbaum Associates, 1988

    Google Scholar 

  39. Cohen J. A power primer. Psychol Bull 1992; 112: (155–9)

    Article  PubMed  CAS  Google Scholar 

  40. Glass GV. Primary, secondary, and meta-analysis of research. Educ Res 1976; 5: (3–8)

    Google Scholar 

  41. Glass GV. Integrating findings: the meta-analysis of research. In: Shulman, editor. Review of research in education. Vol. 5. Washington DC: American Educational Research Association, 1977: 351–79

    Google Scholar 

  42. Hedges LV. Fitting categorical models to effect sizes from a series of experiments. Educ Stat 1982; 7: (119–39)

    Google Scholar 

  43. Glass GU, McGaw B, Smith ML. Meta-analysis in social research. Beverly Hills: Sage, 1981

    Google Scholar 

  44. Hedges LV. Distribution theory for Glass’s estimator of effect size and related estimators. Statistics 1981; 6: (107–28)

    Google Scholar 

  45. Blimkie CJR. Age- and sex-associated variation in strength during childhood: anthropometrie, morphologic, neurologic, and bio-mechanical correlates. In: Gisolfi CV, Lamb DR, editors. Perspectives in exercise science and sports medicine. Vol. 2. Youth, exercise and sport. Indianapolis: Benchmark Press, 1989: 99–163

    Google Scholar 

  46. American College of Sports Medicine. Guidelines for exercise testing and prescription for children, the elderly, and pregnancy. Philadelphia: Williams’ Williams, 1995: 220–40

    Google Scholar 

  47. Gillam GM. Effects of frequency of weight training on muscle strength enhancement. J Sports Med 1981; 21: (432–6)

    Google Scholar 

  48. Moritani T, de Vries HA. Neural factors versus hypertrophy in the time course of muscle strength gain. Am J Phys Med 1979; 58: (115–30)

    PubMed  CAS  Google Scholar 

Download references

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Falk, B., Tenenbaum, G. The Effectiveness of Resistance Training in Children. Sports Med. 22, 176–186 (1996). https://doi.org/10.2165/00007256-199622030-00004

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