The effect of log body mass on the log lifetime DEE per gram (a) and log lifetime RMR per gram (b). an = 92, lifetime DEE per gram = 10.3 − 0.171 log body mass, r2 = 0.241, F = 28.55, P < .001; bn = 321, lifetime RMR per gram = 9.07 − 0.140 Log body mass, r2 = 0.210, F = 84.90, P = 0.001