The Timing of Leg Muscle Recruitment in the Initiation of Rising from a Chair to Standing

本研究之主要目的在增進對自坐到站動作啟始期間下肢肌肉徵召時間之瞭解，並探討起立速度及坐椅高度對肌肉受徵召時間的影響。共有六名健康成年受試者參與此實驗，進行三種自坐到站的動作。在進行自坐到站的動作中，在臀部離開坐椅之前，腓腸肌、脛前肌、股二頭肌、股直肌及臀大肌即開始收縮，其中以股直肌與脛前肌常為最早被徵召的肌肉。當受試者以自然速度及最快速度自正常高度椅子站立起來，肌肉受徵召時間並不因起立速度改變而有顯著不同；而座椅高度升高也不會對肌肉受徵召時間產生顯著的影響。根據實驗結果認為下肢之伸直肌及彎屈肌均參與自坐到站動作的啟始，文中亦對臨床治療提出建議。

關鍵字

自坐到站；肌電圖；腿部肌內

並列摘要

The purposes of this study were to investigate the effects of the speeds of rising and of the chair height on the onset timing of the leg muscle electromyography (EMG) activities during the initiation of rising from a chair to stand. Six healthy adults were recruited and performed sit-to-stand movements under three task conditions. The tibialis anterior, gastrocnemius, biceps femoris, rectus femoris and gluteus maximus were all activated prior to the onset of the lift-off of the buttocks from the chair. The TA and RF were usually the first to be recruited. The differences in the individual muscle onset timing between rising from normal chair at the speeds and at fast speeds were nonsignificant. The effects of increases in chair height on the onset timing of each of the five muscles were also nonsignificant. It is concluded that both flexor and extensor muscles in the leg participated in the initiation of rising up from a chair to stand. Suggestions for clinical training of sit-to-stand movement was also proposed.

並列關鍵字

Sit-to-Stand ； Electromyography ； Leg muscles

國際替代計量

The Timing of Leg Muscle Recruitment in the Initiation of Rising from a Chair to Standing

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