Resting Metabolism Rate

Resting Metabolic Rate (RMR) is measurement of number of calories body burns at rest doing basic functions to stay alive. Functions include but not limited to organs working, heart beating lungs breathing, nutrient processing, protein synthesis, ion transport etc. RMR involves about 65% of total energy expenditure. RMR is usually calculated in the morning after sleep. BMR is what RMR is about. RMR and BMR are usually used interchangeably.  


Determiners of RMR

For most of the people, variables such as height, weight, gender, and fat-free body mass can help calculate RMR. Fat-free is as important as other variables. Body surface area is determined by formula using height and weight. For small number of people, who have physical conditions may have strange RMR. According to latest research, RMR of different individuals with same values for key variables, do not differ much or differ insignificantly.


Resting Metabolic Rate (RMR) Formula:

Males = {9.99 x weight (kg) + 6.25 x height (cm) - 4.92 x age (years) + 5} kcal/day

Females = {9.99 x weight (kg) + 6.25 x height (cm) - 4.92 x age (years) – 161} kcal/day


Factors that affect RMR

Age: With age, RMR decreases.

Genetics: Genetics can be reason for decrease in RMR.

Muscle: RMR rises due to more muscle.

Meal: RMR rises due to small regular meals.

Weather: RMR rises due to living in cold environment.

Pregnancy: RMR rises due to pregnancy.

Supplements: RMR can rise because of some supplements.

Crash dieting: Crash-dieting decreases RMR.


Change in RMR and diet

Loss of muscle decreases RMR. Just losing fat does not lower RMR. It is important to go through sensible program that helps lose fat without losing muscle. People who go on crash-diet end up lowering RMR not necessarily by losing fat but by losing muscle.

RMR and BMR is associated with calorie awareness and helps regulate calorie intake and calorie expenditure correctly.

Last update: June 17, 2017 12:34:14 pm

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