I have decided on at least a base scale for a measurement I call the HMI or Humanoid Muscularity Index.
This in my opinion is better than BMI since someone healthy and muscular and someone unhealthy and fat can have the same BMI but they would not have the same HMI.
This base scale goes from -3 to 3.
-3: Very fat
In a famine this is a good thing but in a surplus it is really bad.
There is a very high chance of MI and Cirrhosis along with GERD.
This is better than -3 in a surplus but worse in a famine. MI and cirrhosis rate is much lower but GERD is still very prevalent.
-1: Slightly fat
This is better than -2 in a surplus but worse in a famine. There is a low chance of GERD but it still occurs.
This is equally good in a surplus and a famine. Not much muscle definition and fat percentage is low. Basically, this is baseline.
1: Slightly muscular
There is a bit of muscle definition here and heart and liver problems are almost nonexistent. It is worse in a famine than in a surplus
Most muscles show and it is even better in a surplus than 1 but is worse in a famine
3: Very Muscular
Every single muscle shows and because the muscles are so big, the heart hypertrophies and these people get what is called Athletes Heart where you have ventricular hypertrophy, increased stroke volume, and decreased heart rate.
Now in the case of my Kepler Bb humanoids, since they have 2 hearts and 2 blood supplies, there is less hypertrophy per heart but they still hypertrophy.
Now my momma told me that the base scale doesn't take into account people who are both fat and muscular and she is right. It also doesn't take into account difference in distribution of fat and muscle or underweight people.
So how can I improve this measurement to take into account what the base scale doesn't?