What is the definition of physical inactivity?

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BlackTom AI · Accepted Answer

When assessing the definition of physical inactivity, it's important to distinguish between different meanings often used in exercise science.
Option a: 'A lack of daily physical activity above 6 METs' is not a standard definition. METs (metabolic equivalents) describe energy expenditure levels during activities, but physical inactivity is not defined by achieving a specific MET value above a threshold; it’s about overall sufficiency relative to guidelines.
Option b: 'Insufficient physical activity level to meet current physical activity guidelines' aligns with common definitions in public health and exercise science. It states that inactivity occurs when a person does not reach the recommended amount or intensity of activity outlined in guidelines, which captures the overarching concept of not meeting targets.
Option c: 'All behaviours that involve low energy expenditure and high sitting' describes sedentary behavior, which is related but distinct from physical inactivity. Sedentary time refers to mostly sedentary activities, whereas physical inactivity is about not meeting prescribed activity guidelines, even if some low-energy or non-sedentary periods occur.
Option d: 'Engaging in too little exercise' focuses specifically on exercise, a subset of activity. Physical inactivity encompasses more than just exercise; it includes insufficient overall activity, including non-exercise physical activities, so this is an incomplete narrowing of the concept.
Taken together, option b accurately captures the broad definition used in guidelines and research for physical inactivity, while the other choices describe related but not equivalent concepts or oversimplify the idea.

Physical Activity and Health

What is the definition of physical inactivity?

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