Training glossaryFundamentals & measures
FFMI (fat-free mass index)
FFMI relates fat-free mass to height to put lean mass in context beyond raw body weight.
Also known as: Fat-free mass index
FFMI depends on weight, height and an estimated body-fat percentage. That means it carries the margin of error of whatever method was used to estimate body fat.
It can help track body-composition context, but it does not define genetic potential, health or training quality on its own.
See also
Sources
Scientific references behind this entry.
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