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疲劳是经常会有的,但表现不明显,使人难以察觉,所以不被人们重视。医学研究证明,疲劳实际上是一种中毒现象,人体肌肉活动时可产生乳酸,如果把乳酸从疲劳的肌肉中排出,疲劳即可消除。肌肉活动过程中,人体还会产生一些“疲劳毒素”物质,有害身体健康,若疲劳过度就会积劳成疾,因之不可等闲视之。疲劳可分为以下几种:
Fatigue is often there, but the performance is not obvious, it is difficult to detect, so not to be valued. Medical studies have shown that fatigue is actually a poisoning phenomenon, the body’s activity can produce lactic acid, if the lactic acid exhausted from the fatigue of the muscles, fatigue can be eliminated. Muscle activity process, the human body will produce some “fatigue toxins” substances, harmful to health, fatigue will be overworked, so can not be ignored. Fatigue can be divided into the following categories: