Column Type Description Examples
datetime datetime Datetime in timezone where data was collected. 2020-01-01 12:00:00
subject_id string Unique ID of the subject. SUB_2DK, 001
wear boolean Devices worn or not. True, False
timedelta timedelta Time since last fix. 0 days 00:00:15
vertical_counts integer Vertical counts. 214
horizontal_counts integer Horizontal counts. 34
perpendicular_counts integer Perpendicular counts. 134
vm_counts integer Vector magnitude counts. 234
movement string Bodily movement defined by anatomy and biomechanics. Left arm flexion, Right arm extension
action string Process of doing something, typically to achieve an aim or purpose Walking, Running, Sitting
activity string Activities of daily life: a thing that a person does or has done (HETUS categories) Free