Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, United States.
J Musculoskelet Neuronal Interact. 2024 Dec 1;24(4):343-352.
This study investigated the impact of hamstring strain injuries (HSI) and vision on muscle recruitment and postural control in athletes with HSI.
Fourteen athletes with HSI and fourteen healthy controls performed a single-leg balance task under eyes-closed and eyes-open conditions while leaning to the maximum forward and backward. The root-mean-square electromyography (EMG), median frequency, and center of pressure (COP) trajectories were calculated for 15 seconds. A two-way repeated measures ANOVA was conducted to assess differences between the groups and eye conditions.
Individuals with HSI exhibited lower hamstring activation during postural leans in the lateral hamstring (p = 0.009) during forward lean and both lateral (p = 0.001) and medial hamstring (p < 0.001) during backward lean. There were no significant changes in median frequency between the groups. Consequently, this resulted in a greater sway range and a larger 95% confidence ellipse area. The eye conditions primarily affected EMG frequency and COP parameters during leaning in both directions.
Athletes with HSI exhibit a persistent deficit in hamstring activation, adversely affecting their postural control. These muscle impairments may compromise balance control and may impact sports performance. Therefore, implementing balance training programs should be considered in clinical rehabilitation for HSI.
本研究旨在探讨腘绳肌拉伤（HSI）和视力对 HSI 运动员肌肉募集和姿势控制的影响。
14 名 HSI 运动员和 14 名健康对照者在闭眼和睁眼条件下进行单腿平衡任务，最大程度地向前和向后倾斜。计算了 15 秒的均方根肌电图（EMG）、中值频率和中心压力（COP）轨迹。采用双向重复测量方差分析评估组间和眼条件的差异。
在向前倾斜时，HSI 个体在侧向腘绳肌（p=0.009）和向后倾斜时在侧向（p=0.001）和内侧腘绳肌（p<0.001）的姿势倾斜中表现出较低的腘绳肌激活。组间中值频率没有显著变化。因此，这导致了更大的摆动范围和更大的 95%置信椭圆面积。眼条件主要影响了两个方向倾斜时的 EMG 频率和 COP 参数。
HSI 运动员表现出持续的腘绳肌激活缺陷，这对他们的姿势控制产生不利影响。这些肌肉损伤可能会影响平衡控制并影响运动表现。因此，在 HSI 的临床康复中应考虑实施平衡训练计划。
