随躯干旋转角度的增加，竖脊肌肌电幅度呈升高的趋势，但差异无统计学意义（P＞0．05）。
The EMG average amplitude was increased with the increase of the trunk rotation angle without significant difference (P>0.05).
结论躯干旋转时核心肌群肌力的增强，对于改善慢性非特异性腰痛患者的局部稳定性有重要意义。
ConclusionIncreasing the rotary strength of trunks is important to improve local stability in patients with chronic nonspecific low back pain.
手臂和肩膀的旋转伸展动作帮助肩部及其联接躯干的肌肉群充分热身。游泳时将连续不停的运用这些肌肉。
The arm and shoulder rotation stretch warms up the muscle that surrounds the shoulder jointed the body. These muscles are used continuously during swimming.
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