Heymsfield et al reported equations for skeletal muscle mass based on data from the US National Health and Nutrition Survey (NHANES). The authors are from Louisiana State University, Verona University (Verona, Italy) and Clemson University.
Parameters:
(1) race: non-Hispanic White versus non-Hispanic Black
(2) sex
(3) age in years
(4) weight in kilograms
(5) height in meters
(6) waist circumference in cm
skeletal muscle mass in kilograms for a white male in Series 1 =
= (0.23 * (weight)) + (0.15 * (height)) - (0.058 * (age)) - (0.0005 * ((age)^2)) - 13.2
skeletal muscle mass in kilograms for a white male in Series 2 =
= (0.46 * (weight)) + (0.03 * (height)) + (0.013 * (age)) - (0.0006 * ((age)^2)) - (0.28 * (waist)) + 13.8
skeletal muscle mass in kilograms for a white female in Series 1 =
= (0.19 * (weight)) + (0.11 * (height)) - (0.095 * (age)) + (0.0003 * ((age)^2)) - 9
skeletal muscle mass in kilograms for a white female in Series 2 =
= (0.24 * (weight)) + (0.09 * (height)) - (0.097* (age)) + (0.0004 * ((age)^2)) - (0.06 * (waist)) - 3.9
skeletal muscle mass in kilograms for a black male in Series 1 =
= (0.26 * (weight)) + (0.16 * (height)) - (0.054 * (age)) - (0.0007 * ((age)^2)) - 14.8
skeletal muscle mass in kilograms for a black male in Series 2 =
= (0.50 * (weight)) + (0.03 * (height)) + (0.031 * (age)) - (0.0008 * ((age)^2)) - (0.31 * (waist)) + 13.3
skeletal muscle mass in kilograms for a black female in Series 1 =
= (0.21 * (weight)) + (0.12 * (height)) - (0.132 * (age)) + (0.0006 * ((age)^2)) - 9.6
skeletal muscle mass in kilograms for a black female in Series 2 =
= (0.26 * (weight)) + (0.10 * (height)) - (0.120 * (age)) + (0.0006 * ((age)^2)) - (0.06 * (waist)) - 4.9
