腳踏車運動中固定與活動式骨盆支撐對下肢肌肉活化之影響

Effects of fixed and dynamic pelvic support on lower extrimity muscle activation during pedaling movement

黃紫琇(Tzu-Hsiu Huang)

指導教授 ： 蕭世芬

高雄醫學大學/健康科學院/行為科學研究所/碩士(2005年)

摘要

研究目的：骨盆控制在人類位移功能扮演重要的角色，因此本實驗的目的在於瞭解活動式骨盆支撐的腳踏車運動，其下肢肌肉活化模式是否與固定式骨盆支撐不同，而較近似於步行，並假設活動式骨盆支撐會較固定式骨盆支撐徵召更多的肌肉活動。方法：本研究使用表面肌電圖記錄下肢肌肉在不同腳踏車模式之活化情形，分別為：固定座椅輕鬆組（SE）、固定座椅用力組（SH）、活動座椅無阻力組（D0）、活動座椅加十磅阻力組（D10）、活動座椅加50％體重阻力組（D50）。本研究共計十九位健康成人參與，將肌電圖資料分為活化時序與活化量來分析。結果與結論：五種腳踏車模式中，下肢肌肉之活化順序、活化時期皆沒有改變，顯示活動式與固定式骨盆支撐腳踏車運動的肌肉活化模式相似，並沒有較近似於步行；而活化量的部分，股四頭肌、比目魚肌與前脛肌與阻力較為相關，在兩種座椅模式，皆是阻力越強活化量越大。而大腿後肌群、腓腸肌的活化量則與骨盆支撐模式較為相關，在活動座椅腳踏車活動的肌肉活化量較大，顯示在活動式骨盆支撐的腳踏車運動中，雙關節肌肉有較多的肌肉徵召；亦顯現出雙關節肌肉因應任務不同時的微調功能。

關鍵字

腳踏車運動 ； 肌肉活化 ； 骨盆支撐

並列摘要

Purpose: In human locomotion, pelvic control is very important. The purpose of this study was to understand the movement patterns of pedaling with mobile and fixed pelvic support and compare with gait. And also we hypothesize the muscular activities in this condition are higher than them with static pelvic support. Methods: We used surface EMG to record the muscle activities of lower extremities during various pedaling conditions (static-easy (SE), static-hard (SH), dynamic without resistance (D0), dynamic with 10 pounds resistance (D10), and dynamic with 50% body weight resistance (D50)). Nineteen healthy adults were tested, and we analyzed the data as two parts: timing and amplitude.
Results & Conclusion: Among five conditions the sequence and periods of muscle activation did not change. It appeared that the movement patterns of pedaling with mobile and fixed pelvic support showed no changes and were still different from gait. The amplitude of quadriceps, soleus, and tibialis anterior were correlated with loads. During two support conditions, these muscles activated more as loads increased. The amplitude of hamstrings and gastrocnemius were more related with pelvic support. During dynamic support modes, even the load was low the muscle activation was still higher than that in SE mode. It appeared biarticular muscles recruit more during dynamic pelvic support mode, and also showed the ability to adjust under the task demands.

並列關鍵字

muscle activation ； pedaling ； pelvic support

參考文獻

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