在径赛运动中,人体能量的供给是决定运动成绩的重要因素之一。在以无氧酵解供能为主的运动中,随着能量的产生乳酸也不断生成。乳酸在肌细胞内产生后,一方面通过降低胞内PH值而抑制酵解酶系的活性,使糖酵解过程减速;另一方面,细胞内H~+浓度的升高,也会减弱在兴奋一收缩偶联中Ca~(++)与肌原蛋白的结合,减少处于“激发态”的肌动球蛋白的数量,从而使肌肉收缩力量减弱。因此乳酸的生成便成为限制运动的因素之一,而了解运动后恢复期内乳酸消除的规律,则 In track athletics, the supply of body energy is one of the important factors that determine athletic performance. In the anaerobic glycolysis-based exercise, with the generation of energy lactic acid is also continuously generated. Lactic acid produced in muscle cells, on the one hand by reducing the intracellular PH value and inhibit the activity of the enzyme system, so that slow down the process of glycolysis; the other hand, intracellular H ~ + concentration increased, will also be weakened in Excitement Coupling Ca ~ (++) with myosin in a contractile coupling reduces the amount of actomyosin that is in an “excited state,” thereby weakening muscle contractility. Therefore, the formation of lactic acid has become one of the factors limiting exercise, and understand the law of lactate elimination during exercise recovery, then