The muscle mass iindex (MMI) is a measure of muscle mass comparable to the body mass index.



(1) muscle mass in kilograms (based on equations of Lee et al)

(2) body height in meters

(3) gender


muscle mass index =

= (muscle mass in kg) / ((body height in meters)^2)

Muscle Mass

Male MMI

Female MMI


>= 10.75

>= 6.75

Grade I sarcopenia

8.51 to 10.74

5.76 to 6.74

Grade II sarcopenia

< 8.51

< 5.76


There should be additional categories for people with increased muscle mass such as body builders.


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