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Environmental Temperature :  Both the heat and cold raise the BMR.

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:

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Environmental Temperature :  Both the heat and cold raise the BMR.

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  1. 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.

  2. 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.

  3. 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:  655 + (9.6 x W) + (1.7 x H) - (4.7 x A)

  4. 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

  5. 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: 655 + (4.36 x weight) + (4.31 x height) – (4.7 x age) very light light moderate heavy very heavy Men: REE x 1.3 1.6 1.7 2.1 2.4 Women REE x 1.3 1.5 1.6 1.9 2.2

  6. 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………………..0 35 – 49………………..100 50 – 64………………..200

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