Rousseau elaborated his thought on physical activity in his Emile, which insists on that body order cultivation should be based on the nature order. There are three dimensions in body order, which include the body in childhood and the body in adult, the body in material and the body in spirit, the ability from body and the desire from body. The function of physical activity is to coordinate and develop the relation among these three dimensions according to nature rules in the life world to foster the body order which conforms to nature order. The foundation of body order is based on free physi...