Table 1.

Definitions of physical activity.

Terms	Definitions
Physical activity	(Originally) Any bodily movement produced by skeletal muscles that results in energy expenditure [18]
	(Practically) Physically active behavior that is comparable to MVPA [19,20]
Physical inactivity	A PA level that is not sufficient for meeting the present PA recommendations [20,21]
	Threshold: [20] The non-achievement of 150 min of MVPA per week or 75 min of VPA per week or an equivalent combination of moderate- and vigorous-intensity activity
Sedentary behavior	Any waking behavior characterized by an energy expenditure ≤1.5 METs, while in a sitting, reclining or lying posture [20,22,23]

MVPA, moderate to vigorous-intensity physical activity; VPA, vigorous-intensity physical activity; METs, metabolic equivalents.