This may be VERY OLD but in the balance file creature_physio its show you like
[.?AVPhysiologyBalance@@]
MuscleInit = 0.500000
FitnessInit = 0.500000
EnergyInit = 1.000000
BreathInit = 1.000000
SecondsPerYear = 3600.000000
HealthDeathThreshold = 0.001000
EnergySleepMarginMin = 0.150000...