In addition, the reliability and validity of the IPAQ Korean version has been established [11]. The Short IPAQ form is comprised of separate domain scores for walking, moderate-intensity and vigorous-intensity activities, and sedentary behavior, including work, transportation, domestic chores, gardening and leisure-time. Sedentary behavior (min/week) was time spent sitting during an ordinary weekday and weekend. Based on self-reported frequency (day) and duration (h) of physical activity, corresponding metabolic equivalent (MET-h/week) values were calculated using the following equations