# REE from VO2max

Part 1 of this series is here

REE (Resting Energy Expenditure) can be calculated from VO2 and VCO2 (Resting Energy Expenditure “REE”).

REE = [3.9 (VO2) + 1.1 (VCO2)] 1.44

VO2 = oxygen uptake (ml/min)
VCO2 = carbon dioxide output (ml/min)

Respiratory quotient (RQ) = VCO2/VO2

Here are my numbers from the start of my VO2max testing:

 value mult product VO2 0.24 3.9 0.936 VCO2 0.19 1.1 0.209 sum 1.145 mult 1.44 REE 1.6488 kCal/min 60 min/hr 98.928 kCal/hr 24 hrs/day 2374.272 kCal/day

That number seems about right. This number is for sitting up in a chair and talking. This is a higher number than while sleeping.

## REE/RMR/BMR

From (Difference Between BMR and RMR):

Basal Metabolic Rate (BMR) and Resting Metabolic Rate (RMR) are rates used to estimate the amount of calories a person will burn if he is at rest for 24 hours.

Also known as Resting Energy Expenditure (REE), Resting Metabolic Rate is measured under less restrictive conditions than Basal Metabolic Rate. It does not require the person to spend the night in the testing facility to ensure at least 8 hours of sleep and rest before testing.

BMR is typically 10% less than RMR .

2374 / (1+.1) = 2158 kCals

## Activity Multipliers

Typical multipliers for activity are:

Choosing Sedentary (BMR x 0.2) : 2158 * 1.2 = 2589 kCal/day

That is a multiplier of 15.4 (kCal/lb). That seems like a pretty high number.

## Fat Percentage

RER = 0.7 is 100% calories from fat

RER=1.0 is 100% of calories from carbs

%fat = 1-((RER-0.7)/0.3)

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