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題 名 | 肌肉伸展縮短週期之彈性能量與神經肌肉控制機轉=The Effects of Elastic Energy and Myoelectrical Potentiation on Stretch-Shortening Cycle |
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作 者 | 周立偉; | 書刊名 | 國立體育學院論叢 |
卷 期 | 10:1 1999.10[民88.10] |
頁 次 | 頁217-224 |
分類號 | 528.9012 |
關鍵詞 | 肌肉收縮; 動作控制; 伸展縮短週期; Muscle contraction; Motor control; Stretch-shortening cycle; |
語 文 | 中文(Chinese) |
中文摘要 | 肌肉由離心收縮的形態在很短的時間內轉變成向心收縮,這種肌肉收縮的周期稱 為「伸展縮短週期」。在伸展縮短周期中,向心收縮期之肌力輸出會明顯大於單純做向心收 縮之肌肉,目前大部分學者認為有二大主因:彈性能量及神經肌肉控制,其中支持彈性能量 為主因的實驗,多是發現其向心收縮期之肌電圖值此單純做向心收縮運動來的小,由此再推 論其肌力增加的主因是彈性能量的儲存。而支持神經肌肉控制為主者,一是發現向心收縮期 之肌電圖值此單純做向心收縮運動來的大,或是以跳躍時所做的功來推算出大部分的能量在 轉換期會被消耗掉,故其肌力增加是因為神經肌肉控制使得興奮的肌纖維變多。但由於唯有 經由神經肌肉控制造成肌肉有一定的張力之下,肌肉才可能儲存彈性能量,因此兩者之間會 有相互影響且不可分。日後研究可朝向以彈性能量與神經肌肉控制二者共同對伸展縮短個期 的影響及二者之間的關係做深入的探討。 |
英文摘要 | The muscle contraction type translates quickly from eccentric to concentric is called Stretch-shortening Cycle (SSC). Force output produced by SSC is larger than that by a simply concentric contraction. The explanation of this phenomenon is that the force output in concentric phase is affected by elastic energy and myoelectrical potentiation. Scientists who believe elastic energy is the major factor that influences the force output found that the integral EMG value in SSC concentric phase is smaller than that by a purely concentric contraction, they concluded that the increased force output is mainly caused by elastic energy. Other scientists think that myoelectrical potentiation is the major factor found that the integral EMG value in SSC concentric phase is larger than that by a purely concentric contraction, or that most of the work produced at the eccentric phase was translated into heat during coupling time. so they believe the increased force output is due to additional activated muscle fibers induced by myoelectrical potentiation. Since only when muscle fibers are firing and at certain tension, the muscle is able to store elastic energy, we conclude that these two factors have closely relationship. Further studies can focus on the effects of both elastic energy and myoelectrical potentiation, and as well as their interactions on SSC. |
本系統中英文摘要資訊取自各篇刊載內容。