Table 1 Summary of composition and temporal duration metrics of upright and stepping events
Composition of upright and stepping events | Description | Units |
|---|---|---|
 Daily step count | Average number of steps per day across the measurement period. Indicator of volume of physical activity | steps/day |
 Daily upright events | Average number of upright events per day across the measurement period. Equivalent to the number of sit-to-stand transitions per day | n/day |
 Daily stepping events | Average number of stepping events per day across the measurement period. Indicator of how fragmented stepping behaviour is across the day | n/day |
 Duration of stepping events | Average duration of all stepping events across the measurement period. Indicator of capacity | min/event |
 Steps per stepping event | Average number of steps per stepping event across the measurement period. Indicator of capacity. | steps/event |
 Step-weighted cadence | Average step-weighted cadence per day across the measurement period. Calculated as the mean daily step-weighted cadence (weighted by steps per event) of all stepping events. Indicator of step-rate (a proxy for intensity) that takes into account all steps | steps/min |
 Upright event duration | Average duration of all upright eventacross the measurement period | min |
 Proportion of stepping to standing time | Average proportion of time spent stepping when upright across the measurement period | % |
 Stepping events per upright event | Average number of stepping events per upright event per day. Indicator of how fragmented stepping is within upright events on average | n/event |
 Steps per upright event | Average number of steps per upright event per day. Indicator of the average stepping volume per upright event | steps/event |
Temporal distribution of upright and stepping events | Description | Units |
 Upright event burstiness | Average daily upright event burstiness (inter-event time distribution) across the measurement period. Indicator of the degree to which upright events are clustered together with longer sedentary events between clusters, versus a more uniform distribution of upright events through the day | Bn |
 Sedentary event burstiness | Average daily sedentary event burstiness (inter-event time distribution) across the measurement period. Indicator of the degree to which sedentary events are clustered together with longer upright events between clusters, versus a more uniform distribution of sedentary events through the day | Bn |