一、准备活动的生理作用课堂准备活动时,人体借助于体育的各种运动项目、内容进行合理的身体练习,以刺激大脑皮层中枢的兴奋性,加强机体各器官、系统的活动,并尽快地使机体工作能力的生理惰性得到克服,缩短人体对工作的过程。人体从静止状态进入运动时,内脏器官的活动也随之发生变化。由于呼吸和血液循环系统的机能惰性,使机体处于氧供应不足的状态。同时,各活动器官完成任何一项发 First, the physiological role of preparatory activities classroom preparation activities, the human body with the help of sports of various sports, the content of reasonable physical exercises to stimulate the excitability of the cerebral cortex center to enhance the body’s organs and systems activities, and as soon as possible So that the physical inertia of the working ability of the body can be overcome and the human body can shorten the working process. When the human body moves from rest state, the activity of internal organs also changes. Due to the inertia of the respiratory and circulatory system, the body is in a state of insufficient oxygen supply. At the same time, each activity organs to complete any hair