Effects of combined strength and power training on physical performance and interlimb asymmetries in adolescent female soccer players

Pardos-Mainer, Elena, Casajus, Jose, Bishop, Chris ORCID: https://orcid.org/0000-0002-1505-1287 and Gonzalo-Skok, Oliver (2020) Effects of combined strength and power training on physical performance and interlimb asymmetries in adolescent female soccer players. International Journal of Sports Physiology and Performance, 15 (8) . pp. 1147-1155. ISSN 1555-0265 [Article] (doi:10.1123/ijspp.2019-0265)

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Abstract

Purpose: This study examined the effects of an 8-week combined strength and power training (CSPT) intervention on physical performance and inter-limb asymmetries in adolescent female soccer players.

Methods: Thirty-seven adolescent female soccer players (age: 16.1±1.1 yrs) were randomly assigned to a control (CG, n = 18) and experimental group (EG, n = 19). EG performed CSPT twice a week, which consisted of strength and power exercises that trained the major muscles of the lower body and trunk musculature. Pre- and post-intervention tests included unilateral and bilateral horizontal and countermovement jump tests, a 40-m sprint test (10 and 30-m split times), a 10-m sprint with a 180º change of direction (COD) test and a multiple COD test (V-cut test). Asymmetries were also analyzed in the unilateral tests.

Results: Significant group by time interaction of the improvement between pre and post-tests were observed for speed (Effect size (ES): -1.30 to -1.16) and COD tests (ES: -0.62 to -0.61) but not in jumping (ES: -0.09 to 0.28) and inter-limb asymmetries tests (ES: -0.13 to 0.57). Conclusions: The short-term in-season CSPT program induced greater speed and COD performance improvements compared to soccer training alone in adolescent female soccer players.

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