Date of Award

2016

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Health, Physical Education, and Recreation

First Advisor

Dennis Dolny

Abstract

Aquatic training has become more prevalent as a means of training power, and provides unique features such as buoyancy and inflicting less stress on the body than traditional land based training. Purpose: The purpose of this study was to assess absolute and relative peak propulsive and mean power in loaded countermovement jumps (CMJ) performed on land and in water in Division I soccer players and gymnasts. Methods: Twenty-four Utah State University soccer players (N=12) and gymnasts (N=12) performed randomized countermovement jumps in eight conditions (Land BW, BW+10%, BW+20%, BW+30%; Chest-height water BW, BW+10%, BW+20%, BW+30%). Peak power (PP), relative peak power (rPP), mean power (MP), and relative mean power (rMP) were examined for all jumping conditions. A 2 (sport team) by 2 (environment) by 2 (load) repeated measures ANOVA was used to evaluate main effects and interactions. Results: PP, rPP, MP, and rMP were not significantly different for increased loads within the same environment. When compared to jumps performed on land, all four variables were significantly higher for water conditions (p<0.001). Mean values for each environment were 3,845.9 ± 30.2 W, 60.4 ± 0.5 W/kg, 1,605.6 ± 54.1 W, and 25.2 ± 0.8 W/kg for PP, rPP, MP, and rMP respectively for land, and 6,829.3 ± 405.7 W, 326.9 ± 18.8 W/kg, 2,659.8 ± 118.8 W, and 126.9 ± 5.5 for water. Sport team affiliation had a significant effect for rPP, MP, and rMP (p<0.03), and an interaction effect for environment*sport was also present for all four variables tested (p<0.01). An aquatic environment provides resistance that can result in higher power production than on land, making it ideal training environment for athletes.

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