Garby et al reported an equation for estimating basal energy expenditure in women. The authors are from Odense University in Denmark.
Parameters:
(1) fat-free mass (FFM) in kilograms
(2) body weight in kilograms
(3) fat mass (FM) in kilograms
body mass =
= FFM + FM
resting energy expenditure in Watts =
= (1.35 * (fat-free mass)) + (0.31 * (fat mass)) =
1 Watt = 1 Joule per second
1 Watt per day = 86,400 Joules per day
86,400 Joule per day = 20.64 kcal per day
resting energy expenditure in kcal per day =
= (20.64 * 1.35 * (fat-free mass)) + (20.64 * 0.31 * (fat mass)) =
= (27.86 * (FFM)) + (6.398 * (FM))
