哪三块肌肉可以保证腿的直立

哪三块肌肉可以保证腿的直立
2025-02-12 08:30:56
推荐回答(1个)
回答1:

  臀大肌,股四头肌,小腿三头肌。

  臀大肌这块肌肉很发达,直接位于骨盆后外侧面,维持人体直立姿势。近固定时,
使大腿后伸和旋外,如后摆腿和后踢腿动作。该肌上半部使大腿外展,下半部使大腿内收
;远固定时,一侧收缩,使骨盆向对侧转动,如转体动作,两侧收缩使骨盆后倾, 维持人
体直立姿势。采用俯卧“背腿”,负重腿屈伸和负重体屈伸等练习可发展该肌的力量。

股四头肌这是人体最有力的肌肉之一,位于大腿前表面皮下,有四个头,即股直肌
、股中肌、股外肌、股内肌。近固定时,使大腿屈、小腿伸;远固定时,使大腿在膝关节
处伸即牵拉股骨向前(如由下蹲到站立的动作);保持股骨垂直,维持人体直立姿势。 采用
负重深蹲和负重伸小腿等练习可发展该肌的力量。

小腿三头肌位于小腿后面浅层,特别发达,使小腿后部隆起,它由腓肠肌和比目鱼
肌组成。比目鱼肌位于腓肠肌的深层。近固定时,能使小腿和足屈。远固定时,使股骨远
侧端和小腿骨拉向后方,使膝关节伸直,协同维持人体的直立。

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