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对青少年和成年人来说,运动前拉伸他们的肌肉是很重要的。年轻运动员的身体更柔软和富有弹性,所以他们只需要进行一般性的热身活动。教练开发了一
It is important for teens and adults to stretch their muscles before exercising. The younger athletes are physically softer and more resilient, so they only need regular warm-up activities. Coach developed one