垂直跳跃
脚踝
生物力学
光学(聚焦)
工作(物理)
膝关节
跳跃
物理医学与康复
膝关节屈曲
地面反作用力
运动学
医学
部队平台
口腔正畸科
数学
解剖
物理
外科
热力学
光学
经典力学
量子力学
作者
John R. Harry,Ryan K. Lanier,Brandon Nunley,Jarrod Blinch
标识
DOI:10.1016/j.humov.2019.102521
摘要
Abstract This study examined biomechanical differences between external and internal foci of attention during vertical jump landings in males and females. Twenty-four healthy adults performed eight vertical jump landings using both internal and external foci while three-dimensional kinematic and ground reaction force (GRF) data were obtained. Two (focus) by two (sex) analyses of variance (α = 0.05) and Cohen's d effect sizes (ES) were used to compare differences in vertical GRF, joint angular positions and displacements, and lower limb joint angular work between foci and between sexes. Significantly greater knee contributions to total angular work occurred during external versus internal focus landings regardless of sex (p = .013; ES = 0.30). Significantly smaller plantarflexion angles (p = .019; ES = 0.53) and significantly greater knee flexion angles were observed at ground contact (p
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