# Basal metabolic rate (BMR)

It is the rate of energy expenditure per unit time by endothermic animals at rest.

• BMR increases with an increase in muscle mass
• BMR decreases with age and in lean body mass

Aerobics fitness level, a product of cardiovascular exercise, while previously thought to have an effect on BMR.

Anaerobic exercise does increase resting energy consumption.

The primary organ responsible for regulating metabolism is the hypothalamus (diencephalon & forms of floor and part of the lateral wall of the third ventricle of the cerebrum)

## BMR formula

To calculate your BMR, you require an equation. Into that, you enter your individual weight and height measurements and your age. There is two formula used for BMR calculation:

• Harris-Benedict formula
• Mifflin-St Joer formula
1. ### Harris-Benedict formula

This formula is created in 1919 following a study by Jamer Arthur Harris and Francis Gano Benedict. The equation is revised in 1984 to improve accuracy.

• Equation for men

BMR= 66.47 + (6.24×weight in lbs) +

(1.27×height in inches) – (6.755×age)

• Equation for women

BMR= 655.1 + (4.35×weight in lbs) +

(4.7×height in inches) – (4.7×age)

1. ### Mifflin-St Joer formula

In 1990 a study by Mifflin MD and St Joe was published in the American Journal of clinical nutrition. It is discussed a new predictive equation for resting energy expenditure in healthy individuals.

• Equation for men

BMR= (4.536 × weight in lbs) + (15.88 × height in inches) –

(5 × age) + 5

• Equation for women

BMR = (4.536 × weight in lbs) + (15.88 × height in inches) –

(5 × age) – 161