Abstract：Purpose: This study examined the accelerometer-determined physical activity (PA) of university students who were participating in the step aerobic physical education (SAPE) program, and the contribution of SAPE to daily PA and health-related guidelines. Methods: Seventy-six participants (aged 21.20±1.05), wore an accelerometer for seven consecutive days, and they were divided into two groups: regularly participating in extra-curricular PA (EPA, n=24) and not participating in EPA (Non-EPA, n=52). Accumulated PA (count･min^(-1)･day^(-1), steps･day^(-1), and min･day^(-1) spent in moderate-to-vigorous PA (MVPA)), and bouts per day spent in MVPA in sessions of 5, 10 and 20 min were analyzed. Results: The main findings of the study were that (a) EPA group were significantly more active than Non-EPA group in all PA variables (p＜.05; p＜.01), (b) they were more active and spent more bouts of MVPA on weekdays than weekend days (p＜.01) expect 20-min bouts of MVPA, and (c) almost all (99%) students reached the daily recommended 30 min MVPA during SAPE (range=124; median=67.50). Conclusion: Although attending SAPE may be helpful in reaching PA targets, regularly participating in EPA is the key to reach the recommended minimum level of weekly PA. (Full text)