【論文摘要】Effect of Different Warm-Up Exercises on Muscle Activation and Postural Stability During Aiming in Archery

【論文摘要】不同暖身運動對射箭選手瞄靶時肌肉收縮與姿勢穩定度的影響

劉晏辰(Yen-Chen Liu) ； 吳聰義(Tsung-Yi Wu) ； 劉明煌(Ming-Huang Liu) ； 陳哲修(Che-Hsiu Chen) ； 楊文傑(Wen-Chieh Yang)

《物理治療》 44卷4期 (2019/12) Pp. 298-299

https://doi.org/10.6215/FJPT.201912.P15

摘要

Background and Purpose: Warm-up facilitates the neuromuscular readiness for sport and reduces the risk of injury. However, it remains unclear whether different types of warm-up exercise may affect the behavior of the neuromuscular system in a specific sport. This study investigated the effect of different warm-up exercises on muscle activations and postural stability during aiming in recurve archery. Methods: Twenty college archery athletes were recruited in this study. Participants completed 3 test conditions, including no warm-up, core stability warm-up and dynamic resistance warm-up, within a 14-day period. In each condition, participants performed 36 shoots (6 shoots × 6 rounds) after practiced the specified warm-up exercise. Muscle activation level was measured using the root mean square electromyogram (EMG) of 7 muscles, including bilateral middle deltoid, bilateral middle trapezius, bilateral erector spinae and draw arm extensor digitorum. Postural stability was measured using the 95% confidence ellipse of center of pressure (COP) sway recorded by a force platform. Results: In muscle activation during aiming, root mean square EMG of 7 muscles were significantly higher under both core stability warm-up and dynamic resistance warm-up than under no warm-up. In addition, core stability warm-up demonstrated significantly greater symmetry of bilateral middle trapezius and erector spinae activation than that of dynamic resistance warm-up and no warm-up. In postural stability, core stability warm-up demonstrated significantly smaller COP sway ellipse than the dynamic resistance warm-up and no warm-up. Conclusion: It is concluded that warm-up exercises facilitate the contraction of muscles during aiming in archery, and core stability warm-up is more preferable than dynamic resistance warm-up in balancing the contraction of bilateral trunk muscles and improving postural stability. Clinical Relevance: It is suggested that the activities for warm-up exercise might affect the activation of muscles in the subsequent sport. Therefore, the design of warm-up exercises should take the movement characteristics of individual sport into consideration.