Sha Zhanxin, Zhou Zhaoxian, Dai Boyi
School of Kinesiology and Nutrition, College of Education and Human Sciences, The University of Southern Mississippi, Hattiesburg, MS, USA.
School of Computing, College of Art and Science, The University of Southern Mississippi, Hattiesburg, MS, USA.
J Hum Kinet. 2021 Mar 31;78:41-48. doi: 10.2478/hukin-2021-0028. eCollection 2021 Mar.
This study aimed to analyze counter-movement jump (CMJ) performance in time and frequency domains. Fortyfour Division I American football players participated in the study. Kinetic variables were collected from both dominant and non-dominant legs using two force plates. Normalized peak power, normalized net impulse, and normalized peak force significantly correlated with jump height (r = .960, r = .998, r = .725, respectively with p < .05). The mean frequency component was significantly correlated with CMJ performance (r = .355 with p < .05). The reliability of the frequency variables was higher than the time domain variables. Frequency domain variables showed weaker correlations with jump height compared with time domain variables. Frequency domain analysis provides frequency components, which represent the rate of energy transmission from the eccentric phase to the end of the push-off phase. Frequency component information may provide additional information for the analyses of CMJ performance for athletes.
本研究旨在分析反向纵跳（CMJ）在时域和频域中的表现。44名美国一级橄榄球运动员参与了该研究。使用两个测力台收集优势腿和非优势腿的动力学变量。归一化峰值功率、归一化净冲量和归一化峰值力与跳跃高度显著相关（分别为r = 0.960、r = 0.998、r = 0.725，p < 0.05）。平均频率分量与CMJ表现显著相关（r = 0.355，p < 0.05）。频率变量的可靠性高于时域变量。与时域变量相比，频域变量与跳跃高度的相关性较弱。频域分析提供了频率分量，其代表了从离心阶段到蹬伸阶段结束时的能量传输速率。频率分量信息可为运动员CMJ表现的分析提供额外信息。
