Asaeda Makoto, Hirata Kazuhiko, Ohnishi Tomoya, Ito Hideyuki, Miyahara So, Fukuhara Koki, Nakashima Yuki, Iwamoto Yoshitaka, Ushio Kai, Mikami Yukio, Adachi Nobuo
Division of Rehabilitation, Department of Clinical Practice and Support, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
Faculty of Wakayama Health Care Sciences, Takarazuka University of Medical and Health, 2252 Nakanoshima, Wakayama, 640-8392, Japan.
Asia Pac J Sports Med Arthrosc Rehabil Technol. 2024 Jul 16;37:40-46. doi: 10.1016/j.asmart.2024.06.002. eCollection 2024 Jul.
Muscle fatigue contributes to anterior cruciate ligament (ACL) injuries, with increased knee and hip abduction observed during fatigue. However, there have been no reports revealing the differences between fatigue tasks or the duration of these changes. In this study, we conducted single-leg drop landings before and after hip and knee fatigue tasks to elucidate the changes in lower limb biomechanics over time.
Twenty-two male participants performed single-leg drop landings before, immediately after, and 5, 10, and 15 min after fatigue tasks involving isokinetic hip abduction/adduction (hip fatigue task [HFT]) and knee extension/flexion (knee fatigue task [KFT]). Hip and knee kinematic and kinetic data were collected using a three-dimensional motion analysis device and two force plates. A two-way ANOVA was performed with both the fatigue task (HFT and KFT) and time point (Time 1 to Time 4) as factors, and the main effects and interactions were calculated.
The knee adduction angle after the HFT was significantly greater than that after KFT immediately following the fatigue task. The knee flexion moment was significantly lower in the KFT, whereas the knee adduction and internal rotation moments were significantly higher in the HFT immediately after the fatigue task.
This study revealed distinct kinematic and kinetic changes specific to each fatigue task, particularly in the frontal plane for hip joint tasks and the sagittal plane for knee joint tasks. These findings could assist in the development of ACL injury prevention programs tailored to the functional improvement and exercise capacity of each joint.
肌肉疲劳会导致前交叉韧带（ACL）损伤，疲劳时观察到膝关节和髋关节外展增加。然而，尚无报告揭示疲劳任务之间的差异或这些变化的持续时间。在本研究中，我们在髋关节和膝关节疲劳任务前后进行了单腿落地试验，以阐明下肢生物力学随时间的变化。
22名男性参与者在涉及等速髋关节外展/内收（髋关节疲劳任务[HFT]）和膝关节伸展/屈曲（膝关节疲劳任务[KFT]）的疲劳任务之前、之后立即以及之后5、10和15分钟进行单腿落地试验。使用三维运动分析设备和两个测力板收集髋关节和膝关节的运动学和动力学数据。以疲劳任务（HFT和KFT）和时间点（时间1至时间4）为因素进行双向方差分析，并计算主效应和交互作用。
疲劳任务后立即进行HFT时的膝关节内收角度显著大于KFT后的角度。KFT中的膝关节屈曲力矩显著较低，而疲劳任务后立即进行HFT时的膝关节内收和内旋力矩显著较高。
本研究揭示了每种疲劳任务特有的明显运动学和动力学变化，特别是在髋关节任务的额状面和膝关节任务的矢状面。这些发现有助于制定针对每个关节功能改善和运动能力的ACL损伤预防计划。
