人体在运动时必须有能量的供给。人体的能量来源于体内的糖、脂肪和蛋白质,另外还与氧的利用有密切关系。 运动强度(指单位时间内完成的运动负荷量)不同,人体运动时的供能方式亦不同。在运动强度相当大(如快速跑)时,氧供应不足,能量大部分依赖肌糖元的无氧酵解来供给,所以运动后体内乳酸增多。 The human body must have a supply of energy while exercising. The body’s energy comes from the body’s sugar, fat and protein, in addition is also closely related to the use of oxygen. Exercise intensity (refers to the unit of time to complete the exercise load) is different, human body movement of the energy supply is also different. In a considerable exercise intensity (such as rapid run), the oxygen supply is insufficient, most of the energy dependent on muscle glycogen supply anaerobic glycol, so the body after exercise increased lactate.