To estimate the PA level, we used the Korean version of the WHO GPAQ. We asked the participant to recollect the activities routinely performed in a week, and the total amount of PA was calculated by referring to the method of calculating GPAQ score12. PA level as metabolic equivalent (MET) per week and time (min) per week and sedentary time (min) per day were calculated according to GPAQ analysis guidelines. Energy consumption during PA per week was calculated using the MET Equation [1 MET = 3.5 mL O2/kg/min].
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