Acta of bioengineering and biomechanics · 2026
Lower extremity coordination variability and motor control during tennis lateral recovery: The role of forehand stance.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Wang Jun, Xia Zifan, Liu Fujing, Qian Yihan, Zhu Chengyuan, Xu Yufan, Cen Xuanzhen, Sun Dong, Janicijevic Danica, Song Yang, Gu Yaodong
Аннотация
PURPOSE: The primary objective of this research is to examine variations in lower extremity segmental coupling coordination variability (CV) during the recovery phase following a tennis stroke, specifically comparing open, semi-open, and neutral stances.
METHODS: This study evaluated 14 advanced male players performing forehand strokes and lateral recoveries across these stances. Kinematic data from a motion capture system and a modified vector coding technique were used to calculate segmental CV of eight lower extremity coupling pairs during brake and push-off phases.
RESULTS: A one-way repeated measures analysis of variance and one-dimensional statistical parametric mapping analysis revealed that stances significantly alter coordination strategies. During the push-off phase, the open stance exhibited significantly higher CV in pelvis sagittal vs thigh sagittal coupling compared to the semi-open stance (P < 0.05, d = 0.78). Furthermore, during the 57.5-61.3% period of this phase, thigh sagittal vs shank frontal coupling CV was significantly lower in the open stance.
CONCLUSIONS: These findings indicate that open stance recovery utilizes unique coordination strategies, characterized by increased pelvis-thigh and decreased thigh-shank CV. From a motor control perspective, reduced distal variability likely stabilizes the knee for optimal lateral force transmission. Conversely, the increased proximal variability likely serves as a compensatory mechanism to facilitate rapid trunk repositioning and maintain dynamic balance. Ultimately, this task-specific trade-off between distal stability and proximal flexibility highlights the movement efficiency of advanced tennis players.
METHODS: This study evaluated 14 advanced male players performing forehand strokes and lateral recoveries across these stances. Kinematic data from a motion capture system and a modified vector coding technique were used to calculate segmental CV of eight lower extremity coupling pairs during brake and push-off phases.
RESULTS: A one-way repeated measures analysis of variance and one-dimensional statistical parametric mapping analysis revealed that stances significantly alter coordination strategies. During the push-off phase, the open stance exhibited significantly higher CV in pelvis sagittal vs thigh sagittal coupling compared to the semi-open stance (P < 0.05, d = 0.78). Furthermore, during the 57.5-61.3% period of this phase, thigh sagittal vs shank frontal coupling CV was significantly lower in the open stance.
CONCLUSIONS: These findings indicate that open stance recovery utilizes unique coordination strategies, characterized by increased pelvis-thigh and decreased thigh-shank CV. From a motor control perspective, reduced distal variability likely stabilizes the knee for optimal lateral force transmission. Conversely, the increased proximal variability likely serves as a compensatory mechanism to facilitate rapid trunk repositioning and maintain dynamic balance. Ultimately, this task-specific trade-off between distal stability and proximal flexibility highlights the movement efficiency of advanced tennis players.