Physical activity

Physical activity is bodily movement produced by skeletal muscles that requires energy expenditure. It includes movement in daily life, work, transport, recreation, and exercise.

Exercise: Planned, structured, repetitive physical activity intended to improve or maintain physical fitness. Exercise is a deliberate subset of physical activity, not a synonym for all movement.
Exercise intensity: The effort required to perform physical activity, measured in absolute or relative terms. Intensity determines how demanding a movement is for a particular person.
Physical activity guidelines: Evidence-based recommendations for the amount and types of activity associated with health benefits. Guidelines turn evidence about activity and health into practical weekly targets.
Cardiovascular disease: A group of disorders affecting the heart and blood vessels. Regular activity is associated with lower risk of several cardiovascular disorders.
Physical fitness: A set of attributes related to the ability to perform physical activity. Physical activity can build fitness, but activity and fitness describe behavior and capacity.
Aerobic exercise: Sustained activity that primarily uses oxidative metabolism to supply energy. It is a common form of activity whose energy supply depends on oxygen use.
Accelerometer: A device that measures acceleration and can estimate bodily movement over time. Accelerometers capture movement patterns that self-reports may miss.
Type 2 diabetes: A chronic metabolic disease characterized by insulin resistance and impaired blood-glucose regulation. Physical activity improves glucose regulation and helps reduce disease risk.
Sedentary behavior: Waking behavior involving sitting, reclining, or lying with very low energy expenditure. It distinguishes prolonged low-movement time from activity, even in people who exercise.
Anaerobic exercise: High-intensity activity in which energy is supplied rapidly without relying primarily on oxidative metabolism. Brief, intense movement places different immediate demands on energy supply.

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