很早以前人们就把“快(痛快)食、快眠、快便”做为身体健康的重要标志之一。喜爱体育运动的人,由于身体能经常得到活动,自然也就常常会有明显的空腹感,所以食欲往往较好,容易达到“快食”的条件。另外,由于身体得到活动又能很好地进餐,再通过运动后的淋浴清洁身体、消除疲劳,因而也往往可以很快地入睡。也就是说,适当的运动能创造良好的“快眠”条件。然而,对不少人来说“快便”问题有时却 Long ago, people put “fast (happy) food, quick sleep, quick access” as one of the important signs of good health. People who love sports, because the body can often be active, often have a clear sense of fasting, so the appetite is often better, easy to achieve “fast food” conditions. In addition, as the body gets active and can have a good meal, it can often quickly fall asleep by cleaning the body with a shower after exercising to relieve fatigue. In other words, proper exercise creates a good “sleep-fast” condition. However, for many people, it is sometimes a matter of “quick access”