跆拳道選手與一般大學生腹部核心肌群與動態平衡之差異

Abstract

目的：探討規律運動對於腹部核心肌群的收縮比與動態平衡之關係。方法：使用Vicon 動態紅外線攝影機10 台、KISTLER 9281(60×40cm2 )測力板1 塊、BIOVISION 肌電訊號擷取系統1 部及10 條肌電訊號線，收集18 名受試者資料，實驗進行前，分配各組受試者至馬偕醫院拍攝腹部核心肌群超音波影像，用以比較腹內斜肌、腹外斜肌與腹橫肌的收縮比例變化。實驗進行時，以雙腳跳躍單腳落地之動作檢測受試者動態平衡穩定性，並比較落地時對於腹直肌、腹外斜肌、豎脊肌群（胸椎段）、右股直肌、右脛前肌、右股二頭肌及右腓腸肌（內側）之肌電訊號。以獨立樣本t 考驗，比較跆拳道選手與一般大學生在核心肌群收縮比與動態平衡之差異性。結果：跆拳道選手與一般大學生之核心肌群收縮比未達顯著差異；在動態平衡穩定性之比較亦未達顯著差異；一至十秒之動態平衡值，各組受試者之間比較未達顯著水準；落地後下肢肌電訊號，受試者間亦未達顯著水準。結論：規律運動與未規律運動之族群，兩組受試者中未看見核心肌群收縮比與動態平衡能力之差異。Purpose: In order to examine the difference of the contraction ratio of the core muscle and dynamic balance test between Taekwondo athletes and college students. Methods: Ten Vicon infrared cameras, a KISTLER 9281 (60×40 cm2) force plate, and a BIOVISION system were used to record the data. 18 subjects involved in the experiments, all subjects were assigned to Mackay Memorial Hospital to take ultrasound imaging on the core muscles of internal abdominal oblique, abdominal external oblique and transverse abdominis muscles to compare the contraction ratio. The subjects were asked to execute the dynamic balance by squat jump and one foot landing,and the electromyography of abdominal rectus abdominis and external oblique muscles, paravertebral muscles (thoracic), right rectus femoris, right calf muscle, right biceps femoris and the right of the gastrocnemius muscle (medial) were also recorded. Independent samples t test was used to compare the difference between the taekwondo athletes and the college students in the contraction ratio of core muscle and dynamic balance. Results: The results indicated that no difference between taekwondo athletes and the college students in the contraction ratio of the core muscles was found. Stability in dynamic balance and the dynamic balance values in 1-10 seconds were not either. No difference between taekwondo athletes and the college students in the comparsion of the EMG datas on the one foot landing was found, either. Conclusion: Between Taekwondo athletes and college students, the contraction ratio of the core muscle had no difference with the dynamic balance.