What percentage of daily total energy expenditure does physical activity typically account for?

Physical activity typically accounts for about 20% of daily total energy expenditure (TDEE) in most individuals, depending on their activity levels. This percentage reflects the contribution of exercise and other movements beyond baseline metabolic functions and the thermic effect of food. The components of TDEE include basal metabolic rate (BMR), the thermic effect of food, and physical activity.

For sedentary individuals, this percentage can be lower, while those who are more active may see a higher contribution. In active individuals or those engaging in structured exercise programs, physical activity can contribute significantly more to TDEE, sometimes approaching or exceeding 30%, but for the average person, 20% is a reasonable estimate.

Understanding this percentage helps inform treatment strategies for obesity management, emphasizing that increasing physical activity can have meaningful impacts on overall energy expenditure, weight maintenance, and weight loss efforts.