What percentage of total energy expenditure typically comes from resting energy expenditure?

Resting energy expenditure (REE) is a significant component of total energy expenditure, representing the energy required to maintain basic physiological functions while at rest. This includes processes such as breathing, circulation, cell production, nutrient processing, and thermoregulation. For most individuals, REE accounts for a large majority of their total energy expenditure, typically falling between 60% to 70%.

This substantial percentage is influenced by factors such as body composition, age, gender, and genetics; individuals with more muscle mass generally have a higher REE. Understanding the contribution of REE to total energy expenditure is crucial for devising effective nutrition and fitness strategies, as it provides insight into the baseline metabolic demands of the body. Recognizing this high percentage helps practitioners in the field of lifestyle medicine to assess energy needs accurately and design tailored interventions for weight management, athletic performance, and overall health improvement.