Question 1

What is FFMI?

Accepted Answer

Fat-Free Mass Index (FFMI) is a measurement that helps you understand your muscle mass relative to your height. Unlike BMI, which doesn't distinguish between fat and muscle, FFMI specifically measures your lean muscle mass.

Question 2

What's the difference between FFMI and normalized FFMI?

Accepted Answer

Regular FFMI is your raw calculation, while normalized FFMI adjusts for height to allow fair comparisons between people of different heights. The normalization formula adjusts everyone's FFMI to what it would be if they were 1.8 meters tall.

Question 3

What FFMI indicates steroid use?

Accepted Answer

While FFMI > 25 is often associated with steroid use based on the 1995 Kouri study, research on NCAA football players found 26.4% had FFMI values above 25 naturally. FFMI should be one of many factors considered, not a definitive test.

Question 4

What is a good FFMI for natural lifters?

Accepted Answer

A realistic goal for most dedicated natural lifters is an FFMI of 21-23. This represents excellent muscle development achievable with 5-10 years of consistent training.

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