补充支链氨基酸对不同项目运动员作用及安全性的机制研究进展

支链氨基酸（BCAAs）是蛋白类运动营养补剂中相当重要的营养素，不同项目的运动员由于膳食不能满足大强度运动训练的营养需求，经常需要额外补充含BCAAs的蛋白类营养补剂。但长期过量地补充可能对机体的免疫力、肾脏功能、消化系统等产生不良影响。采用文献综述法，对补充支链氨基酸对抗阻运动和耐力运动的作用机制进行了总结，并分析其对机体免疫力的影响和过量补充的负面影响机制，探讨运动员如何合理补充支链氨基酸，避免对身体造成损害。

Research Development on the Mechanism and Safety of Branched-Chain Amino Acid Supplement for Athletes of Different Sports

Branched-chain amino acid (BCAAs) is a very important nutrient of protein sports nutrition supplement. Because the diet cannot meet the nutritional needs of high intensity training, athletes often take additional protein nutrition supplements containing BCAAs. However, the long-term excessive supplement of BCAAs may have adverse effects on immune function, renal function, digestive system and so on. Using the method of literature review, this paper summarizes the mechanism of branched-chain amino acid supplement in resistance exercise and endurance exercise and analyzes its effect on immunity and the negative impact of overdose. It tries to explore how the athletes can take the supplement of BCAAs reasonably and avoid the damage to the body.