Measurement of BMR

 Measurement of BMR- BMR is the amount of heat production in calories therefore it can be measured by Direct or Indirect Calorimetry as described earlier. There are several formulas also to calculate a person’s BMR as described below-

Harris–Benedict equations-The original Harris–Benedict equations were published in 1918 and 1919 as given below-

Men	BMR = 66.5 + ( 13.75 × weight in kg ) + ( 5.003 × height in cm ) – ( 6.755 × age in years )
Women	BMR = 655 + ( 9.563 × weight in kg ) + ( 1.850 × height in cm ) – ( 4.676 × age in years )

 

The Harris–Benedict equations were revised by Roza and Shizgal in 1984 which is given below-

Men	BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
Women	BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)

 

The Harris–Benedict equations were revised by Mifflin and St Jeor in 1990 which is given below-

Men	BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
Women	BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161

 

Read’s Formula- This formula is often used in clinical setting and is ±10% accurate. It is very simple to use as seen below-

BMR=0.75(Pulse Rate+0.74xPulse Pressure)-72