Effects of Concurrent Training on Explosive Strength and VO_2max in Prepubescent Children

Abstract

The purpose of this study was to compare the effects of an 8-weeks training period of resistance training alone (GR), combined resistance and endurance training (GCON) and a control group (GC) on explosive strength and VO_2max in a large sample of prepubescent boys and girls. 125 healthy children (58 boys, 67 girls), aged 10–11 years old (10.8±0.4 years) were assigned into 2 training groups to train twice a week for 8 weeks: GR (19 boys, 22 girls), GCON (21 boys, 24 girls) and a control group (GC: 18 boys, 21 girls; no training program). A significant but medium-sized increase from pre- to the post-training in the vertical jump (Effect size=0.22, F=34.44, p<0.01) and VO_2max (Effect size=0.19, F=32.89, p<0.01) was observed. A significant large increase in the 1 kg (Effect size=0.53, F=202.17, p<0.01) and 3 kg (Effect size=0.48, F=132.1, p<0.01) ball throwing, standing long jump (Effect size=0.53, F=72.93, p<0.01) and running speed (Effect size=0.45, F=122.21, p<0.01) was also observed. The training group (GR and GCON) and sex factors did not significantly influence the evolution of strength variables from pre- to the post-training. The VO_2max increased significantly only in GCON. Concurrent training is equally effective on training-induced explosive strength, and more efficient than resistance training only for VO_2max, in prepubescent boys and girls. This should be taken into consideration in order to optimize strength training school-based programs.

Key words

youth - exercise school-based ­programs - power - endurance

• References

• 1 Adam C, Klissouras V, Ravassolo M, Renson R, Tuxworth W, Kemper H, Vanmechelen W, Hlobil H, Beunen G, Levarlet-Joye H, Vanlierde A. Eurofit: Handbook for the Eurofit Test of Physical Fitness. Rome: Edigraf Editoriale Gráfica; 1988
• 2 American College of Sports Medicine . Guidelines for Exercise Testing and Prescription. 7^th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2006
• 3 Anderson LB, Haraldsdottir J. Coronary heart disease risk factors, physical activity, and fitness in young Danes. Med Sci Sports Exerc 1995; 27: 158-163
• 4 Anderssen SA, Cooper AR, Riddoch C, Sardinha LB, Harro M, Brage S, Andersen LB. Low cardiorespiratory fitness is a strong predictor for clustering of cardiovascular disease risk factors in children independent of country, age and sex. Eur J Cardiovasc Prev Rehabil 2007; 14: 526-531
• 5 Cepero MR, López R, Suárez-Llorca C, Andreu-Cabrera E, Rojas FJ. Fitness test profiles in children aged 8-12 years old in Granada (Spain). J Hum Sport Exerc 2011; 6: 135-146
• 6 Coffey VG, Hawley JA. The molecular bases of training adaptation. Sports Med 2007; 37: 737-763
• 7 Coleman KJ, Heath EM, Alcala IS. Overweight and aerobic fitness in children in the United States/Mexico border region. Rev Panam Salud Publica 2004; 15: 262-271
• 8 Dencker M, Thorsson O, Karlsson M, Lindén C, Eiberg S, Wollmer P, Andersen B. Gender differences and determinants of aerobic fitness in children aged 8–11 years. Eur J Appl Physiol 2007; 99: 19-26
• 9 Dorgo S, King GA, Candelaria NG, Bader JO, Brickey GD, Adams CE. Effects of manual resistance training on fitness in adolescents. J Strength Cond Res 2009; 23: 2287-2294
• 10 Dudley GA, Djamil R. Incompatibility of endurance- and strength training modes of exercise. J Appl Physiol 1985; 59: 1446-1451
• 11 Duke PM, Litt IR, Gross RT. Adolescents self-assessment of sexual maturation. Pediatrics 1980; 66: 918-920
• 12 Faigenbaum AD, Kraemer WJ, Blimkie CJR, Jeffreys I, Micheli LJ, Nitka M, Rowland TW. Youth resistance training: Updated position statement paper from the National Strength and Conditioning Association. J Strength Cond Res 2009; 23: S60-S79
• 13 Faigenbaum AD, Kraemer WJ, Cahill B, Chandler J, Dziados J, Elfrink LD, Forman E, Gaudiose M, Micheli L, Nitka M, Roberts S. Youth resistance training: position statement paper and literature review. Strength Cond J 1996; 18: 62-75
• 14 Faigenbaum A, Mediate P. The effects of medicine ball training on physical fitness in high school physical education students. Phys Educ 2006; 63: 160-167
• 15 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
• 16 García-Pallarés J, Izquierdo M. Strategies to optimize concurrent training of strength and aerobic fitness for rowing and canoeing. Sports Med 2011; 41: 329-343
• 17 García-Pallarés J, Sánchez-Medina L, Carrasco L, Diaz A, Izquierdo M. Endurance and neuromuscular changes in world-class level kayakers during a periodized training cycle. Eur J Appl Physiol 2009; 106: 629-638
• 18 González-Badillo JJ, Gorostiaga EM, Arellano R, Izquierdo M. Moderate resistance training volume produces more favorable strength gains than high or low volumes. J Strength Cond Res 2005; 19: 689-697
• 19 Harriss DJ, Atkinson G. Update – ethical standards in sport and exercise science research. Int J Sports Med 2011; 32: 819-821
• 20 Hawley JA. Molecular responses to strength and endurance training: are they incompatible?. Appl Physiol Nutr Metab 2009; 34: 355-361
• 21 Hickson RC. Interference of strength development by simultaneously training strength and endurance. Eur J Appl Physiol 1980; 45: 255-263
• 22 Izquierdo-Gabarren M, Exposito R, Garcia-Pallarés J, Sánchez-Medina L, De Villareal ES, Izquierdo M. Concurrent endurance and strength training not to failure optimizes performance gains. Med Sci Sports Exerc 2010; 42: 1191-1199
• 23 Izquierdo M, Häkkinen K, Ibánez J, Kraemer WJ, Gorostiaga EM. Effects of combined resistance and cardiovascular training on strength, power, muscle cross-sectional area, and endurance markers in middle-aged men. Eur J Appl Physiol 2005; 94: 70-75
• 24 Kraemer W, Fry A, Frykman P, Conroy B, Hoffman J. Resistance training and youth. Pediatr Exerc Sci 1989; 1: 336-350
• 25 Kraemer WJ, Ratamess NA. Fundamentals of resistance training: progression and exercise prescription. Med Sci Sports Exerc 2004; 36: 674-688
• 26 Kvaavik E, Klepp KI, Tell GS, Meyer HE, Batty GD. Physical fitness and physical activity at age 13 years as predictors of cardiovascular disease risk factors at ages 15, 25, 33, and 40 years: extended follow-up of the Oslo Youth Study. Pediatrics 2009; 123: e80-e86
• 27 Léger LA, Mercier D, Gadoury C, Lambert J. The multistage 20 meter shuttle run test for aerobic fitness. J Sports Sci 1988; 6: 93-101
• 28 Lillegard WA, Brown EW, Wilson DJ, Henderson R, Lewis E. Efficacy of strength training in prepubescent to early postpubescent males and females: effects of gender and maturity. Pediatr Rehabil 1997; 1: 147-157
• 29 Linthorne NP. Analysis of standing vertical jumps using a force platform. Am J Phys 2001; 11: 1198-1204
• 30 Malina RM, Bouchard C. Growth Maturation and Physical Aactivity. Champaign, Illinois: Human Kinetics; 1991
• 31 Marfell-Jones M, Olds T, Stewart A, Carter L. International Standards for Anthropometric Assessment. Potchefstroom, South Africa: ISAK; 2006
• 32 Marques MC, Zajac A, Pereira A, Costa AM. Strength training and detraining in different populations: Case studies. J Hum Kinet 2011; (Special Issue): 7-14
• 33 Matton L, Duvigneeaud N, Wijndaele K, Philippaerts R, Duquet W, Beunen G, Claessens A, Thomis M, Lefevre J. Secular trends in anthropometric characteristics, physical fitness, physical activity and biological maturation in Flemish adolescents between 1969 and 2005. Am J Hum Biol 2007; 19: 326-624
• 34 Mayhew JL, Ware JS, Johns RA, Bemben MG. Changes in upper body power following heavy-resistance strength training in college men. Int J Sports Med 1997; 18: 516-520
• 35 Obert P, Mandigouts S, Nottin S, Vinet A, N’Guyen LD, Lecoq AM. Cardiovascular responses to endurance training in children: effect of gender. Eur J Clin Invest 2003; 33: 199-208
• 36 Ortega FB, Tresaco B, Ruiz JR, Moreno LA, Matillas M, Mesa JL, Warnberg J, Bueno M, Tercedor P, Gutiérrez A, Castillo MJ. Cardiorespiratory fitness and sedentary activities are associated with adiposity in adolescents. Obesity 2007; 15: 1589-1599
• 37 Ramsay J, Blimkie C, Smith K, Garner S, Macdougall J, Sale D. Strength training effects in prepubescent boys. Med Sci Sports Exerc 1990; 22: 605-614
• 38 Rowland TW, Boyajian A. Aerobic response to endurance exercise training in children. Pediatrics 1995; 96: 654-658
• 39 Sale DG, McDougall JD, Jacobs I, Garner S. Interaction between concurrent strength and endurance training. J Appl Physiol 1990; 68: 260-270
• 40 Santos E, Janeira M. The effects of plyometric training followed by detraining and reduced training periods on explosive strength in adolescent male basketball players. J Strength Cond Res 2011; 25: 441-452
• 41 Santos A, Marinho DA, Costa AM, Izquierdo M, Marques MC. The effects of concurrent resistance and endurance training follow a specific detraining cycle in young school girls. J Hum Kinet 2011; Special Issue: 93-103
• 42 Santos A, Marinho DA, Costa AM, Izquierdo M, Marques MC. The effects of concurrent resistance and endurance training follow a detraining period in elementary school students. J Strength Cond Res 2012; 26: 1708-1716
• 43 Siegel JA, Camaione DN, Manfredi TG. The effects of upper body resistance training on prepubescent children. Pediatr Exerc Sci 1989; 1: 145-154
• 44 Stenevi-Lundgren S, Daly RM, Lindén C, Gärdsell P, Karlsson MK. Effects of a daily school based physical activity intervention program on muscle development in prepubertal girls. Eur J Appl Physiol 2009; 105: 533-541
• 45 Taanila H, Hemminki A, Suni J, Pihlajamäki H, Parkkari J. Low physical fitness is a strong predictor of health problems among young men: a follow-up study of 1 411 male conscripts. BMC Public Health 2011; 11: 590
• 46 Vinet A, Mandigout S, Nottin S, Nguyen L, Lecoq N, Courteix D, Obert P. Influence of body composition, hemoglobin concentration, and cardiac size and function of gender differences in maximal oxygen uptake in prepubertal children. Chest 2003; 124: 1494-1499