Du Yanyan, Fan Yubo
Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, and with the School of Engineering Medicine, Beihang University, Beijing 100083, China.
Beijing Key Laboratory of Sports Function Assessment and Technical Analysis, School of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing 100191, China.
Bioengineering (Basel). 2023 Feb 27;10(3):301. doi: 10.3390/bioengineering10030301.
This study investigated the effects of fatigue on postural control and biomechanical characteristic of lunge. A total of twelve healthy male collegiate badminton players (21.1 ± 2.2 years; 180.8 ± 4.0 cm; 72.5 ± 8.4 kg; 8.9 ± 3.5 years of experience) performed repeating lunges until exhausted. Postural stability was evaluated through a single-leg balance test using the dominant lower limb on a pressure plate with eyes opened (EO) and eyes closed (EC). The center of pressure (CoP) sway in the entire plantar and sub-regions of the plantar was measured. Kinematic and kinetic data of lunge motion were collected. The postural control was impaired after fatigue. In plantar sub-regions, the area, displacement and distance in the medial-lateral (ML) and anterior-posterior directions of CoP increased significantly ( < 0.05), especially the distance in ML. The medial region of the forefoot is the most sensitive to fatigue. Compared to pre-fatigue, participants experienced a significantly longer phase of pre-drive-off ( < 0.01), less peak moment and peak power of the knee and hip for drive-off ( < 0.01) and less peak moment of the ankle during braking phase ( < 0.05). These findings indicate that, within the setting of this investigation, the different responses to fatigue for CoP sway in plantar sub-regions and the consistency between postural control and biomechanical characteristic of lunge may be beneficial for developing and monitoring a training plan.
本研究调查了疲劳对弓步姿势控制和生物力学特征的影响。共有12名健康的男性大学生羽毛球运动员（年龄21.1±2.2岁；身高180.8±4.0厘米；体重72.5±8.4千克；运动经验8.9±3.5年）进行重复弓步动作直至精疲力竭。姿势稳定性通过在压力板上使用优势下肢进行单腿平衡测试来评估，测试时眼睛睁开（EO）和眼睛闭上（EC）。测量了整个足底及足底子区域的压力中心（CoP）摆动情况。收集了弓步动作的运动学和动力学数据。疲劳后姿势控制受损。在足底子区域，CoP在内外侧（ML）和前后方向上的面积、位移和距离显著增加（P<0.05），尤其是ML方向的距离。前脚掌内侧区域对疲劳最为敏感。与疲劳前相比，参与者的预蹬离阶段明显更长（P<0.01），蹬离时膝关节和髋关节的峰值力矩和峰值功率更小（P<0.01），制动阶段踝关节的峰值力矩更小（P<0.05）。这些发现表明，在本研究的条件下，足底子区域CoP摆动对疲劳的不同反应以及姿势控制与弓步生物力学特征之间的一致性可能有助于制定和监测训练计划。
