Basal Metabolic Rate is the minimal caloric requirement needed to sustain life in a resting individual. This is the amount of energy your body would burn.

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Presentation transcript:

Basal Metabolic Rate is the minimal caloric requirement needed to sustain life in a resting individual. This is the amount of energy your body would burn if you slept all day (24 hours). Factors that affect BMR: Age: In youth, the BMR is higher; age brings less lean body mass and slows the BMR. Height: Tall, thin people have higher BMR's. Growth: Children and pregnant women have higher BMR's. Body Composition: The more lean tissue, the higher the BMR. The more fat tissue, the lower the BMR.

Environmental Temperature: Both the heat and cold raise the BMR. Fasting/Starvation: Fasting/starvation hormones lower the BMR. Malnutrition: Malnutrition lowers the BMR. Stress: Stress hormones can raise the BMR. Fever: Fevers can raise the BMR.

BMR = your body weight in lbs x 10 cal/lb The Harris-Benedict Equation: Males: 66 + (13.7 x W) + (5 x H) - (6.8 x A) Females: (9.6 x W) + (1.7 x H) - (4.7 x A)

Where: W = actual weight in kg (weight in lb/2.2 lb/ kg) H = height in cm (height in inches x 2.54 cm/in) A = age in years

Resting Energy Expenditure Energy required for vital body processes and sedentary activities Men: 66 + (6.23 x weight) + (12.7 x height) – (6.8 x age) Women: (4.36 x weight) + (4.31 x height) – (4.7 x age) very light light moderate heavy very heavy Men: REE x Women REE x

Calorie Needs Body Weight (lbs) X 13 Sedentary/lightly active 16 Moderate Activity 20 Heavy Activity 25 Exceptionally Heavy Activity Subtract appropriate number for age: 25 – 34……………… – 49……………… – 64………………..200

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