Table 2.

Estimation of Basal Metabolic Rate (BMR) and Total Energy Expenditure (TEE) using FAO tables

		Men			Women
	BMRc	BMRs	PAL(*)	BMRc	BMRs	PAL(*)
age	Kcal	Kcal/kg		Kcal	Kcal/kg
15-29	692.2	15.057	1.75	486.6	14.818	1.79
30-44	873.1	11.472	1.82	845.6	8.126	1.87
45-59	873.1	11.472	1.64	845.6	8.126	1.8
60-69	587.7	11.171	1.61	658.5	9.082	1.69
70-79	587.7	11.171	1.62	658.5	9.082	1.55
80+	587.7	11.171	1.3	658.5	9.082	1.19

We extracted the following coefficients for our age-sex groups.

(*) For non overweight adults in USA.

The estimation of energy requirements of an individual is: $\text{BMR\hspace{0.17em}}=\text{\hspace{0.17em}BMRc\hspace{0.17em}}+\text{\hspace{0.17em}BMRs\hspace{0.17em}x\hspace{0.17em}Weight}\left(\text{kg}\right)\to \text{TEE\hspace{0.17em}}=\text{\hspace{0.17em}BMR\hspace{0.17em}x\hspace{0.17em}PAL}$

For a group of N individuals of the same age-sex group with a total biomass “B”, $\text{BMR\hspace{0.17em}}=\text{\hspace{0.17em}N\hspace{0.17em}x\hspace{0.17em}BMRc\hspace{0.17em}}+\text{\hspace{0.17em}BMRs\hspace{0.17em}x\hspace{0.17em}BM}\left(\text{kg}\right)\to \text{TEE\hspace{0.17em}}=\text{\hspace{0.17em}BMR\hspace{0.17em}x\hspace{0.17em}PAL}$

If that same group had a biomass due to overweight (BMI > 25) of “B25”, the energy required to feed that biomass would be: $\text{BMR25\hspace{0.17em}}=\text{\hspace{0.17em}BMRs\hspace{0.17em}x\hspace{0.17em}B}25\left(\text{kg}\right)\to \text{TEE25\hspace{0.17em}}=\text{\hspace{0.17em}BMR25\hspace{0.17em}x\hspace{0.17em}PAL}$