Table 2.

Final definitions of key terms from the sedentary behavior research network (SBRN) terminology consensus project (51).

Term	Definition
Sedentary behavior	Sedentary behavior is any waking behavior characterized by an energy expenditure ≤1.5 metabolic equivalents (METs), while in a sitting, reclining or lying posture. - Sedentary time (ST): The time spent for any duration (e.g., minutes per day) or in any context (e.g., at school or work) in sedentary behaviors. - Sedentary bout: A period of uninterrupted sedentary time. - Sedentary interruptions/breaks: A non-sedentary bout in between two sedentary
Physical inactivity (PI)	An insufficient physical activity level to meet present physical activity recommendations. General definition applies to all age and ability groups.
Stationary behavior	Stationary behavior refers to any waking behavior done while lying, reclining, sitting, or standing, with no ambulation, irrespective of energy expenditure.
Sedentary behavior pattern	The manner in which sedentary behavior is accumulated throughout the day or week while awake (e.g., the timing, duration and frequency of sedentary bouts and breaks). Prolonger: Someone who accumulates sedentary time in extended continuous bouts. Breaker: Someone who accumulates ST with frequent interruptions and in short bouts.
Standing	A position in which one has or is maintaining an upright position while supported by one's feet.
Screen time (ST)	Screen time refers to the time spent on screen-based behaviors. These behaviors can be performed while being sedentary or physically active.
Sitting	A position in which one's weight is supported by one's buttocks rather than one's feet, and in which one's back is upright.
Reclining	Reclining is a body position between sitting and lying.
Lying	Lying refers to being in a horizontal position on a supporting surface.

MET, metabolic equivalent corresponding to resting metabolic rate of the population under study.