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所谓疲劳是指持久或过度劳动后引起机体不适和工作效益减退的反应而言。各种反应是由于脑力劳动或体力劳动后,能量供不应求,于是,体内肝糖元或肌糖元便分解供能。糖元分解后的废物乳酸,在局部体内堆积,反射性地引起局部血管扩张,于是,机体产生肌肉酸痛,四肢无力等感觉。其实,这是机体的一种保护性反应。有人认为疲劳是一种病理状态,对身体有害,这是一种误解。一般只要采取动静结合,适当休息,即可消除。从生理和年龄方面看,女性比男性易出现疲劳,年轻人易疲劳也易消除疲劳,而老年人则相反。有些人害怕疲劳,唯恐疲劳会加重或诱发疾病,也有些人感到疲劳是因为摄入能量少,再加疾病使能量消耗增大的缘故。于是,整日很少活动,但仍感到疲劳。这正是因为缺少活动而使新陈代谢降低,能量消耗少,使血中的糖元无用武之地所致。这样,不仅影响食欲,而且会使糖转化成皮下脂肪。由于肌肉缺少活动,肌肉中的肌糖元无需分解供能,从而使肌肉储备能量的能力减弱,所以,长期缺少活动的
The so-called fatigue refers to the long-term or over-work caused by the body discomfort and work efficiency in terms of diminished response. A variety of reactions is due to mental or manual labor, the energy supply, so the body glycogen or muscle glycogen will decompose for energy. After the decomposition of glycogen lactic acid waste, in the local accumulation of body reflex caused by local vascular dilatation, so the body produces muscle soreness, weakness and other sensations. In fact, this is a protective reaction of the body. Some people think that fatigue is a pathological state, harmful to the body, this is a misunderstanding. As long as the general combination of static and dynamic, appropriate rest, you can eliminate. In terms of physiology and age, women are more prone to fatigue than men. Young people tend to be tired and tired easily, while the elderly are the opposite. Some people are afraid of fatigue, fear of fatigue will aggravate or induce disease, but also because some people feel tired because of less energy intake, coupled with the disease so that energy consumption increases. As a result, little activity throughout the day, but still feel tired. This is precisely because of lack of activity to reduce metabolism, less energy consumption, so that blood sugar useless. This not only affects appetite but also converts sugar into subcutaneous fat. Due to lack of muscle activity, muscle muscle glycogen without decomposition for energy, so that the muscle capacity to reduce energy reserves, so the long-term lack of activity