Lyu Hui, Cao Xueying, Wang Jian
Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China.
Faculty of Sports Science, Ningbo University, Ningbo 315211, China.
Life (Basel). 2024 Jul 28;14(8):943. doi: 10.3390/life14080943.
This study evaluates the effects of general fatiguing exercises on anticipatory postural adjustments (APAs), compensatory postural adjustments (CPAs), and standing stability between 18 individuals with comprehensive training experience (TR) and 18 untrained individuals (UT). Assessments were conducted before and after a 20-min fatiguing exercise using surface electromyography and a force platform during self-initiated perturbation and postural stability tests. Key findings include that, irrespective of fatigue, the APAs onsets in the TrA/IO ( = 0.004), LMF (PRE = 0.003, POST < 0.001), and ST (PRE = 0.001, POST = 0.006) muscles activated earlier in the TR group than in the UT group. Additionally, the APA co-contraction indices of the TrA/IO-LMF (PRE = 0.011, POST = 0.029), TrA/IO-ST ( = 0.014), and LMF-ST (PRE = 0.002, POST = 0.005) muscle pairs were higher in the TR group. After fatigue, the UT group significantly increased CPA co-contraction indices for the TrA/IO-LMF ( = 0.035) and LMF-ST ( = 0.005) muscle pairs. This research highlights the importance of comprehensive training in facilitating feedforward control strategies, particularly for individuals facing challenging postural conditions, such as fatigue or disturbances.
本研究评估了一般疲劳运动对18名有综合训练经验的个体（TR）和18名未经训练的个体（UT）的预期姿势调整（APA）、代偿性姿势调整（CPA）和站立稳定性的影响。在20分钟的疲劳运动前后，使用表面肌电图和力平台在自我引发的扰动和姿势稳定性测试中进行评估。主要发现包括，无论是否疲劳，TR组中腹横肌/腹内斜肌（ = 0.004）、腰大肌（PRE = 0.003，POST < 0.001）和竖脊肌（PRE = 0.001，POST = 0.006）肌肉的APA起始比UT组更早。此外，TR组中腹横肌/腹内斜肌-腰大肌（PRE = 0.011，POST = 0.029）、腹横肌/腹内斜肌-竖脊肌（ = 0.014）和腰大肌-竖脊肌（PRE = 0.002，POST = 0.005）肌肉对的APA共同收缩指数更高。疲劳后，UT组中腹横肌/腹内斜肌-腰大肌（ = 0.035）和腰大肌-竖脊肌（ = 0.005）肌肉对的CPA共同收缩指数显著增加。本研究强调了综合训练在促进前馈控制策略方面的重要性，特别是对于面临具有挑战性的姿势条件（如疲劳或干扰）的个体。
