Abstract：
BACKGROUND: Anterior cruciate ligament injuries are serious conditions encountered in volleyball players and occur frequently during spike jump landings. During spike jumps, the lower limb kinematics and kinetics during landing may be altered in relation to the ball position.
OBJECTIVE: Does the ball position have an effect on lower-limb kinematics and kinetics during spike jumps?
METHODS: We measured the lower limb kinematics and kinetics of 20 healthy female college volleyball athletes during a spike jump using a three-dimensional motion analysis system. The ball positions were set to normal, dominant, and non-dominant positions. A repeated analysis of variance was used to compare the lower limb kinematics and kinetics at the initial contact and the maximum knee flexion during jump landing. Additionally, statistical parametric mapping analysis was used to analyze changes over time during the spike jumps.
RESULTS: At the initial contact of the spike jump landing, the knee valgus angle, trunk lateral bending angle, and maximum knee valgus moment when the ball was set at the non-dominant position increased compared to those at the dominant position. Statistical parametric mapping analysis showed no significant change in knee valgus angle and moment of jump landing.
CONCLUSIONS: Knee valgus angle, trunk lateral bending angle, and maximum knee valgus moment increased with the non-dominant position; furthermore, the risk of ACL injury may also be increased.
CONCLUSIONS: The posture at ball impact may influence the landing kinematics and kinetics. Therefore, it is necessary to pay close attention to movements during and prior to landing.
OBJECTIVE: Does the ball position have an effect on lower-limb kinematics and kinetics during spike jumps?
METHODS: We measured the lower limb kinematics and kinetics of 20 healthy female college volleyball athletes during a spike jump using a three-dimensional motion analysis system. The ball positions were set to normal, dominant, and non-dominant positions. A repeated analysis of variance was used to compare the lower limb kinematics and kinetics at the initial contact and the maximum knee flexion during jump landing. Additionally, statistical parametric mapping analysis was used to analyze changes over time during the spike jumps.
RESULTS: At the initial contact of the spike jump landing, the knee valgus angle, trunk lateral bending angle, and maximum knee valgus moment when the ball was set at the non-dominant position increased compared to those at the dominant position. Statistical parametric mapping analysis showed no significant change in knee valgus angle and moment of jump landing.
CONCLUSIONS: Knee valgus angle, trunk lateral bending angle, and maximum knee valgus moment increased with the non-dominant position; furthermore, the risk of ACL injury may also be increased.
CONCLUSIONS: The posture at ball impact may influence the landing kinematics and kinetics. Therefore, it is necessary to pay close attention to movements during and prior to landing.
摘要：
背景：前交叉韧带损伤是排球运动员遇到的严重情况，并且在扣球跳落过程中经常发生。在尖峰跳跃期间，着陆过程中的下肢运动学和动力学可能会相对于球的位置而改变。
目的：在扣球跳跃过程中，球的位置对下肢运动学和动力学有影响吗？
方法：我们使用三维运动分析系统测量了20名健康女大学生排球运动员在扣球跳跃过程中的下肢运动学和动力学。球的位置设置为正常，支配,和非支配地位。使用重复的方差分析来比较初次接触时的下肢运动学和动力学以及跳跃着陆期间的最大膝关节屈曲。此外,统计参数映射分析用于分析尖峰跳跃期间随时间的变化。
结果：在尖峰跳跃着陆的初始接触时，膝盖外翻角度,躯干横向弯曲角度，与优势位置相比，将球设置在非优势位置时的最大膝盖外翻力矩增加。统计参数作图分析表明，膝关节外翻角度和跳跃着陆时刻无明显变化。
结论：膝关节外翻角度，躯干横向弯曲角度，最大膝关节外翻力矩随非优势位置而增加；此外，ACL损伤的风险也可能增加。
结论：球撞击时的姿势可能会影响着陆运动学和动力学。因此,有必要在着陆期间和着陆之前密切关注运动。
目的：在扣球跳跃过程中，球的位置对下肢运动学和动力学有影响吗？
方法：我们使用三维运动分析系统测量了20名健康女大学生排球运动员在扣球跳跃过程中的下肢运动学和动力学。球的位置设置为正常，支配,和非支配地位。使用重复的方差分析来比较初次接触时的下肢运动学和动力学以及跳跃着陆期间的最大膝关节屈曲。此外,统计参数映射分析用于分析尖峰跳跃期间随时间的变化。
结果：在尖峰跳跃着陆的初始接触时，膝盖外翻角度,躯干横向弯曲角度，与优势位置相比，将球设置在非优势位置时的最大膝盖外翻力矩增加。统计参数作图分析表明，膝关节外翻角度和跳跃着陆时刻无明显变化。
结论：膝关节外翻角度，躯干横向弯曲角度，最大膝关节外翻力矩随非优势位置而增加；此外，ACL损伤的风险也可能增加。
结论：球撞击时的姿势可能会影响着陆运动学和动力学。因此,有必要在着陆期间和着陆之前密切关注运动。
