FFMI — fat free mass index
How much muscle you carry and where the natural ceiling sits
Formula and method
FFMI = lean mass (kg) ÷ height (m)². Normalised FFMI = FFMI + 6.1 × (1.8 − height in metres), adjusting to a 1.8 m reference so people of different heights can be compared.
Sources
- Kouri E.M. et al. Fat-free mass index in users and nonusers of anabolic-androgenic steroids. Clin J Sport Med, 1995.