Dos'Santos Thomas, Thomas Christopher, Comfort Paul, McMahon John J, Jones Paul A
Directorate of Sport, Exercise & Physiotherapy, University of Salford, Salford, Greater Manchester M6 6PU, UK.
Sports (Basel). 2017 Sep 13;5(3):68. doi: 10.3390/sports5030068.
The purpose of this study was to explore the relationships between isometric mid-thigh pull (IMTP) force-time characteristics (peak force and time-specific force vales (100⁻250 ms)) and dynamic performance and compare dynamic performance between stronger and weaker athletes. Forty-three athletes from different sports (rowing, soccer, bicycle motocross, and hockey) performed three trials of the squat jump (SJ), countermovement jump (CMJ), and IMTP, and performed a one repetition maximum power clean (PC). Reactive strength index modified (RSImod) was also calculated from the CMJ. Statistically significant large correlations between IMTP force-time characteristics and PC ( = 0.569⁻0.674, < 0.001), and moderate correlations between IMTP force-time characteristics (excluding force at 100 ms) and RSImod ( = 0.389⁻0.449, = 0.013⁻0.050) were observed. Only force at 250 ms demonstrated a statistically significant moderate correlation with CMJ height ( = 0.346, = 0.016) and no statistically significant associations were observed between IMTP force-time characteristics and SJ height. Stronger athletes (top 10) demonstrated statistically significantly greater CMJ heights, RSImods, and PCs ( ≤ 0.004, = 1.32⁻1.89) compared to weaker (bottom 10) athletes, but no differences in SJ height were observed ( = 0.871, = 0.06). These findings highlight that the ability to apply rapidly high levels of force in short time intervals is integral for PC, CMJ height, and reactive strength.
本研究的目的是探讨等长股中肌拉力（IMTP）的力-时间特征（峰值力和特定时间的力值（100⁻250毫秒））与动态表现之间的关系，并比较强弱运动员之间的动态表现。43名来自不同运动项目（赛艇、足球、自行车越野和曲棍球）的运动员进行了三次深蹲跳（SJ）、反向纵跳（CMJ）和IMTP测试，并进行了一次最大重复功率抓举（PC）。还根据CMJ计算了修正的反应力量指数（RSImod）。观察到IMTP力-时间特征与PC之间存在统计学上显著的强相关性（r = 0.569⁻0.674，P < 0.001），以及IMTP力-时间特征（不包括100毫秒时的力）与RSImod之间存在中等相关性（r = 0.389⁻0.449，P = 0.013⁻0.050）。仅250毫秒时的力与CMJ高度呈现出统计学上显著的中等相关性（r = 0.346，P = 0.016），且未观察到IMTP力-时间特征与SJ高度之间存在统计学上显著的关联。与较弱（排名后10位）的运动员相比，较强的运动员（排名前10位）在CMJ高度、RSImod和PC方面表现出统计学上显著更高的水平（P ≤ 0.004，Cohen's d = 1.32⁻1.89），但在SJ高度上未观察到差异（P = 0.871，Cohen's d = 0.06）。这些发现突出表明，在短时间内快速施加高水平力的能力对于PC、CMJ高度和反应力量至关重要。
