Training glossaryFundamentals & measures
Fat-free mass
Fat-free mass is the estimated body weight left after removing fat mass.
Also known as: FFM
It is used in calculations like FFMI because it adjusts body weight by the fat estimate. If the reported body-fat percentage is wrong, fat-free mass is distorted too.
The value is more useful for context and trends than for concluding individual potential or comparing people without looking at the measurement method.
See also
Sources
Scientific references behind this entry.
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