When you begin to wear your muscles out, decrease the intensity level to something that you could maintain for a longer period.
当你开始意识到你的肌肉不行了，把降低强度到你可以长时间保持的水平。
When you begin to wear your muscles out, decrease the intensity level to something that you could maintain for a longer period.
当你开始意识到你的肌肉不行了，把降低强度到你可以长时间保持的水平。
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