Table 1.

Description of sedentary behavior and physical activity terms with cut points.

Term	Definition	Accelerometer cut-point
Volume
Sedentary time	Time in activities (sitting or lying) that do not increase energy expenditure substantially above the resting level (1.0–1.5 METs) (Sedentary Behaviour Research Network, 2012).	Total minutes < 100 counts/min (Healy et al., 2008, Matthews et al., 2008, Pate et al., 2008).
Light intensity activity	Activities that involve energy expenditure at the level of 1.6–2.9 METs.	100 to 1721 counts/min (Sandroff et al., 2012).
Moderate-to-vigorous intensity activity (MVPA)	Activities that involve energy expenditure above 3.0 METs.	≥ 1722 counts/min (Sandroff et al., 2012)
Mean activity intensity	Sum of daily activity counts/number of wear time minutes (Tudor-Locke et al., 2012).	N/A
Pattern
Break in sedentary time	A defined point in time where there is a change from sedentary to a non-sedentary activity or an interruption in sedentary time (Healy et al., 2008). A break signifies the start of a bout.	Activity count change from < 100 to ≥ 100 counts. A break only occurs if the change in counts is sustained for more than 2 min.
Sedentary bout length	Consecutive minutes when count values fall into the sedentary range (< 100 counts/min). In this study drop time was 2 min (i.e. sedentary bout ends if there is a transition from sedentary to non-sedentary activity that is sustained for greater than 2 min).	Consecutive minutes with recorded counts of < 100/min (if sustained for more than 2 min).
Activity bout length	Consecutive minutes when count values are above the sedentary range (≥ 100). Drop time was again 2 min (i.e. activity bout begins if there is a transition from sedentary to non-sedentary activity that is sustained for greater than 2 min).	Consecutive minutes with recorded counts of ≥ 100/min if sustained more than 2 min.

MET, metabolic equivalent.