Relationships Between Concentric and Eccentric Strength and Countermovement Jump Performance in Resistance Trained Men.
The purpose of this study was to investigate the relationships between concentric and eccentric peak force (PF) and countermovement jump (CMJ) performance in resistance-trained men. Subjects were 12 men (mean +/- SD; age: 25.4 +/- 3.5 years; height: 177.2 +/- 4.5 cm; mass: 84.0 +/- 10.1 kg). The subjects were tested for concentric and eccentric PF using the Exerbotics squat device. Subjects then completed 3 CMJs to allow for the calculation of peak power (PP), peak ground reaction force (PGRF) and jump height (JH). Correlations between the variables of interest were calculated using Pearson product moment correlation coefficients. A large relationship was found between absolute concentric PF and absolute CMJ PP (r = 0.66, p < 0.05). Absolute eccentric PF had a very large relationship with absolute CMJ PP and CMJ JH (r = 0.74, p < 0.01 and r = 0.74, p < 0.001 respectively). In addition absolute eccentric PF was found to have a moderate relationship with relative CMJ PP (r = 0.58, p < 0.05). Relative eccentric PF was had a very large relationship with relative CMJ PP and CMJ JH (r = 0.73, p < 0.001 and r = 0.79, p < 0.001 respectively). Based on these findings strength and conditioning coaches and athletes who wish to enhance CMJ performance may wish to include exercises, which enhance lower body eccentric strength within their training.
Copyright (C) 2016 by the National Strength & Conditioning Association.
Autor / Fonte:Lee A Bridgeman, Michael R McGuigan, Nicholas D Gill, Deborah K Dulson Journal of Strength and Conditioning Research 2016 July 18