Abstract: This paper uses questionnaire method, PSPP, internal control, others in power and opportunities scale (IPC) and physical exercise influence factor questionnaire to assess and research university students in Nanjing. Physical self is used as the intermediary variable to investigate the relationship between the mental control source, physical self and amateur physical exercise. The result shows that:(1) Nanjing university students' source of mental control is inclined to external control with significant differences in sex;(2) The source of mental control has significant correlation with physical exercise participation levels;(3)There is correlation between students' source of psychological control and physical self.(4) Physical self and mental control sources predict exercise levels in two ways.

Key words: source of mental control, physical self, physical exercise