This variable is only available in MAP.
Average total daily activity is a measure of the sum of all activity during an average 24-hour period. Objective measures of physical activity are obtained using a portable actigraph: AX3 (2020-present), GENEActiv (2018-2020), Actical (2005-2018). See the Actigraphy category description for detailed information on each device. Participants are asked to wear the actigraph 24 hours per day for up to 10 days.
Total daily activity is the sum of all activity counts during a 24-hour period, averaged over the number of days that the individual wore the device.