24 hour energy expenditure definition
Resting energy expenditure, abbreviated as REE, is the amount of energy, usually expressed in kcal (food calories), required for a 24-hour period by the body during resting conditions.It is closely related to, but not identical to, basal metabolic rate.esting energy expenditure, abbreviated as REE, is the amount of energy, usually expressed in kcal (food calories), required for a 24-hour period by the body during resting conditions.