也许某些人不知道,敲背、伸懒腰是一种简单易行而十分有益的保健方法,应当倡行。 每当人们在工作、学习面感到劳累时,常常会不由自主地用手去敲敲自己的腰背、手臂,或者是张开双臂,深深地呼一口气,伸个懒腰,顿时会感利全身舒适爽快,精神振作。这是什么道理呢? Perhaps some people do not know that knocking back and stretching is a simple and useful health care method and should be advocated. Whenever people at work, learning surface tired, often involuntarily knocking his hand on the back, arms, or open arms, deep breath, stretch, will suddenly benefit the whole body Comfortable and refreshing, cheer up. What is the reason?