Slow twitch muscle fibers remain contracted longer than fast twitch fibers, with the former being involved in maintenance of posture and the latter in fine and rapid motor function.

• 慢的牵搦肌肉纤维仍旧比快的纤维牵搦收缩更久,而快的纤维牵搦和前者的存在牵涉在姿势的维持和后者较精致及较快速的肌肉构造。