Louder Talin, Thompson Brennan J, Woster Alex, Bressel Eadric
Department of Kinesiology and Health Science, Utah State University, Logan, UT 84322, USA.
Dennis G. Dolny Movement Research Clinic, Sorenson Legacy Foundation Center for Clinical Excellence, Utah State University, Logan, UT 84322, USA.
J Funct Morphol Kinesiol. 2023 Jul 29;8(3):108. doi: 10.3390/jfmk8030108.
The depth jump (DJ) is commonly used to evaluate athletic ability, and has further application in rehabilitation and injury prevention. There is limited research exploring sex-based differences in DJ ground reaction force (GRF) measures. This study aimed to evaluate for sex-based differences in DJ GRF measures and determine sample size thresholds for binary classification of sex. Forty-seven participants from mixed-sex samples of NCAA athletes and young adults performed DJs from various drop heights. Force platform dynamometry and 2-dimensional videography were used to estimate GRF measures. Three-way mixed analysis of variance was used to evaluate main effects and interactions. Receiver operating characteristic (ROC) curve analysis was used to evaluate the combined sensitivity and specificity of dependent measures to sex. Results revealed that reactive strength index scores and rebound jump heights were greater in males than females ( < 0.001). Additionally, young adult females showed greater peak force reduction than young adult males ( = 0.002). ROC curve analysis revealed mixed results that appeared to be influenced by population characteristics and drop height. In conclusion, sex-based differences in DJ performance were observed, and the results of this study provide direction for future DJ investigations.
深度纵跳（DJ）常用于评估运动能力，并且在康复和损伤预防方面有进一步应用。探索DJ地面反作用力（GRF）测量中基于性别的差异的研究有限。本研究旨在评估DJ GRF测量中基于性别的差异，并确定性别二元分类的样本量阈值。来自美国全国大学体育协会（NCAA）运动员和年轻人的混合性别样本中的47名参与者从不同的下落高度进行了DJ动作。使用测力平台动力学和二维摄像来估计GRF测量值。采用三因素混合方差分析来评估主效应和交互作用。受试者工作特征（ROC）曲线分析用于评估相关测量对性别的综合敏感性和特异性。结果显示，男性的反应力量指数得分和反弹跳跃高度高于女性（<0.001）。此外，年轻成年女性比年轻成年男性表现出更大的峰值力量下降（=0.002）。ROC曲线分析显示出混合结果，似乎受到人群特征和下落高度的影响。总之，观察到DJ表现中存在基于性别的差异，本研究结果为未来的DJ研究提供了方向。
