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Basal Metabolic Rate Definition
What Is Basal Metabolic Rate (BMR)?

The metabolic rate as measured under basal conditions: 12 hours after eating, after a restful sleep, no exercise or activity preceding test, elimination of emotional excitement and occurring in a comfortable temperature. Basal Metabolic Rate (BMR) is the energy cost of maintaining the metabolic integrity of the body, nerve and muscle tone, respiration, and circulation. It depends on the amount of metabolically active body tissue, and hence can be calculated from body weight, using different factors for males and females, and at different ages. For children the BMR also includes the energy cost of growth. Experimentally, BMR is measured as the heat output from the body, or the rate of oxygen consumption, under strictly standardized conditions, 12-14 hours after the last meal, completely at rest (but not asleep) and at an environmental temperature of 26-30°C, to ensure thermal neutrality. BMR can be estimated by measuring the rate at which oxygen is taken up and calculating the energy equivalent. A typical value for a man could be 350 litres of oxygen = 1700 kcal (7000 kJ) per day; or just under 0.25 litre, and just over 1 kcal per minute. Rigorous conditions for basal measurements are difficult to attain; more often the metabolic rate is measured when simply at rest; it varies with body weight and composition, but also between individuals who are similar in these respects.

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Disclaimer: The information presented is intended to be used for educational purposes only. The statements made have not been evaluated by the Food and Drug Administration (U.S.). This product is not intended to diagnose, treat, cure or prevent any condition or disease. Please consult with your own physician or health care practitioner regarding any suggestions and recommendations made.