[enemywalker]

I believe a different scale would be helpful for people with above average muscle mass. Check out this research paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4890841/

The claim is that BMI does not differentiate between body lean mass and body fat mass. Things like hydrostatic testing are more accurate for determining body fat mass.

[nradov]

DXA scans are about as accurate as hydrostatic testing, and are much more widely available. In most urban areas you can get one for about $50.