- 期刊
Contribution of Quadriceps and Abdominal Muscles during Unilateral Straight Leg Raising at Two Different Hip Angles
股四頭肌與腹肌於兩種不同髖關節角度之單側直擡腿運動的作用
摘要
本篇研究目的是利用肌電圖偵測股四頭肌及腹肌，以了解當執行單側直膝擡腿運動時，髖關節維持30及60度並配合對側腳平放或彎曲時兩肌肉群的活動。研究中收取20名健康男女，年紀20至35歲之自願者爲研究對象。步驟中要求受測者執行單側直膝擡腿運動至30及60度並使對側腳採不同姿勢，姿勢A（測試腳髖關節擡至30度／對側腳伸直），姿勢B（測試腳髖關節擡至30度／對側腳屈膝），姿勢C（測試腳髖關節擡至60度／對側腳伸直），姿勢D（測試腳髖關節擡至60度／對側腳屈膝）。肌電圖用以記錄右側的股直肌，股內側肌，上腹直肌以及腹外斜肌在姿勢C時有較顯著的活動。直膝擡腿運動時配合較大的髖關節彎曲及對側腳伸直姿勢能增加股直肌，腹直肌及腹外斜肌的活動。因此本研究建議在特定的下肢姿勢下做直膝擡腿運動可加強股直肌，並增加腹肌的活動。
並列摘要
The purpose of this study was to determine the electromyographic (EMG) activities of the quadriceps and abdominal muscles during ipsilateral straight leg raising (SLR) while the hip was kept in 30 and 60 degrees of flexion and combined the contralateral leg either extended or flexed. Twenty healthy adults (10 male, 10 female) ranging in age from 20 to 35 years voluntarily participated in this study. Surface EMG was used to record activities of the rectus femoris (RF), vastus medialis (VM), upper rectus abdominis (URA), and external oblique abdominis (EOA) muscles during unilateral SLR. Four different combinations were combined with SLR. (Combination A: the hip was kept in 30 degrees of flexion/the contralateral leg was kept in extension; Combination B: the hip was kept in 30 degrees of flexion/ the contralateral leg was kept in flexion; Combination C: the hip was kept in 60 degrees of flexion/ the contralateral leg was kept in extension; Combination D: the hip was kept in 60 degrees of flexion/ the contralateral leg was kept in flexion.) The normalized EMG data from the four muscles during the various combinations of lower limb positions were compared. The result showed combination C produced significantly greater activity in the RF, URA and EOA muscles. The relative activity in the RF, URA and EOA was increased during SLR with a larger hip flexion angle and extended contralateral leg. The study suggested that SLR may be used for activating the quadriceps as well as for increasing the abdominal muscles activity by using specific positions of the lower limbs.