title: Effects of High-Velocity Resistance Training on Athletic Performance in Prepuberal Male Soccer Athletes.
abstract: Negra, Y, Chaabene, H, Hammami, M, Hachana, Y, and Granacher, U. Effects of high-velocity resistance training on athletic performance in prepuberal male soccer athletes. J Strength Cond Res 30(12): 3290-3297, 2016-The aim of this study was to assess the effectiveness of a 12-week in-season low-to-moderate load high-velocity resistance training (HVRT) in addition to soccer training as compared with soccer training only on proxies of athletic performance in prepubertal soccer players. Twenty-four male soccer players performed 2 different protocols: (a) regular soccer training with 5 sessions per week (n = 11; age = 12.7 ± 0.3 years) and (b) regular soccer training with 3 sessions per week and HVRT with 2 sessions per week (n = 13; age = 12.8 ± 0.2 years). The outcome measures included tests for the assessment of muscle strength (e.g., 1 repetition maximum [1RM] half-squat tests), jump ability (e.g., countermovement jump, squat jump [SJ], standing long jump [SLJ], and multiple 5-bound tests [MB5s]), linear speed (e.g., 5-, 10-, 20-, and 30-m sprint tests), and change of direction (e.g., T-test and Illinois change of direction test). Results revealed significant group × test interactions for the SJ test (p ≤ 0.05, d = 0.59) and the SLJ test (p < 0.01, d = 0.83). Post hoc tests illustrated significant pre-post changes in the HVRT group (SJ: [INCREMENT]22%, p < 0.001, d = 1.26; SLJ: [INCREMENT]15%, p < 0.001, d = 1.30) but not in the control group. In addition, tendencies toward significant interaction effects were found for the 1RM half-squat (p = 0.08, d = 0.54) and the 10-m sprint test (p = 0.06, d = 0.57). Significant pre-post changes were found for both parameters in the HVRT group only (1RM: [INCREMENT]25%, p < 0.001, d = 1.23; 10-m sprint: [INCREMENT]7%, p < 0.0001, d = 1.47). In summary, in-season low-to-moderate load HVRT conducted in combination with regular soccer training is a safe and feasible intervention that has positive effects on maximal strength, vertical and horizontal jump and sprint performance as compared with soccer training only.
authors.affiliation: 1Research Unit "Sport Performance & Health," Higher Institute of Sport and Physical Education of Ksar Said, Tunis, Tunisia; 2Tunisian Research Laboratory "Sports Performance Optimization," National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia; 3Biological Science Department, Higher Institute of Sports and Physical Education, Manouba University, Tunis, Tunisia; and 4Division of Training and Movement Sciences, Research Focus Cognition Sciences, University of Potsdam, Potsdam, Germany.
authors.forename: Yassine
authors.initials: Y
authors.lastname: Negra
authors.forename: Helmi
authors.initials: H
authors.lastname: Chaabene
authors.forename: Mehréz
authors.initials: M
authors.lastname: Hammami
authors.forename: Younés
authors.initials: Y
authors.lastname: Hachana
authors.forename: Urs
authors.initials: U
authors.lastname: Granacher
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology; D002648:Child; D005080:Exercise Test; D006801:Humans; D008297:Male; D053580:Muscle Strength; D064797:Physical Conditioning, Human / Q000379:methods* / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D012420:Running / Q000502:physiology; D012916:Soccer / Q000502:physiology*