Abstract：Through the inwestigation and research on the state of health of middle-aged teachers, this article presents that there is the third state of body between the state of health and that of falling ill. The third state of body of middle-aged teachers possesses disthct professional features, and sports can regulate their third state of body. It is suggested in this article that they choose suitable manner of sports cenditiening according to their habits of living and their tastes, so that their third state of body can be converted into a state of healt.
