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Concurrent Training in Prepubescent Children: The Effects of 8 Weeks of Strength and Aerobic Training on Explosive Strength and V[Combining Dot Above]O2max

Alves, Ana R.; Marta, Carlos C.; Neiva, Henrique P.; Izquierdo, Mikel; Marques, Mário C.

Journal of Strength and Conditioning Research: July 2016 - Volume 30 - Issue 7 - p 2019–2032
doi: 10.1519/JSC.0000000000001294
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Alves, AR, Marta, CC, Neiva, HP, Izquierdo, M, and Marques, MC. Concurrent training in prepubescent children: the effects of 8 weeks of strength and aerobic training on explosive strength and V[Combining Dot Above]O2max. J Strength Cond Res 30(7): 2019–2032, 2016—The purpose of this study was to compare the effects of 8-week training periods of strength training alone (GS), combined strength and aerobic training in the same session (GCOM1), or in 2 different sessions (GCOM2) on explosive strength and maximal oxygen uptake (V[Combining Dot Above]O2max) in prepubescent children. Of note, 168 healthy children, aged 10–11 years (10.9 ± 0.5), were randomly selected and assigned to 3 training groups to train twice a week for 8 weeks: GS (n = 41), GCOM1 (n = 45), GCOM2 (n = 38) groups, and a control group (GC) (n = 44; no training program). The GC maintained the baseline level, and trained-induced differences were found in the experimental groups. Differences were observed in the 1 and 3-kg medicine ball throws (GS: +5.8 and +8.1%, respectively; GCOM1: +5.7 and +8.7%, respectively; GCOM2: +6.2 and +8%, respectively, p < 0.001) and in the countermovement jump height and in the standing long jump length (GS: +5.1 and +5.2%, respectively; GCOM1: +4.2 and +7%, respectively; GCOM2: +10.2 and +6.4%, respectively, p < 0.001). In addition, the training period induced gains in the 20-m time (GS: +2.1%; GCOM1: +2.1%; GCOM2: +2.3%, p < 0.001). It was shown that the experimental groups (GCOM1, GCOM2, and GS) increased V[Combining Dot Above]O2max, muscular strength, and explosive strength from pretraining to posttraining. The higher gains were observed for concurrent training when it was performed in different sessions. These results suggest that concurrent training in 2 different sessions seems to be an effective and useful method for training-induced explosive strength and V[Combining Dot Above]O2max in prepubescent children. This could be considered as an alternative way to optimize explosive strength training and cardiorespiratory fitness in school-based programs.

1Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal;

2Department of Sport Sciences, Guarda Polytechnique Institute, Guarda, Portugal;

3Research Unit for Inland Development, UDI, Guarda Polytechnique Institute, Guarda, Portugal;

4Research Center in Sport Sciences, Health Sciences and Human Development, CIDESD, University of Trás-os-Montes and Alto Douro (Vila Real), Portugal; and

5Department of Health Sciences, Public University of Navarre, Navarre, Spain

Address correspondence to Mikel Izquierdo, mikel.izquierdo@gmail.com.

Copyright © 2016 by the National Strength & Conditioning Association.