蛋白质不仅是构成生物体的主要成分，而且还具有多种重要功能。人体在运动过程中蛋白质的消耗量增大，蛋白质代谢加强，与运动能力有着密切的联系。本文论述了蛋白质的生理功能，运动员对蛋白质的需要量以及蛋白质代谢对运动能力的影响。 Proteins not only constitute the main components of the organism, but also have a variety of important functions. The human body during exercise increased protein consumption, protein metabolism to enhance, and exercise capacity are closely linked. This article discusses the physiological functions of proteins, the athlete’s need for protein, and the effects of protein metabolism on athletic performance.