what are the means and sd of fat free weight what is ffm in weight measurement how to find sd of ffm how does the sd for fmm and fat free mass compare to total mass what is the sd of fat how to figure mfm/ffm how to find the difference between total and fat mass how do i find sd for ffm average fat mass for weight which is a measure of total fat mass what is the total mass how to figure the sd of total fat mass and fat free mass what is the sd of total weight and fat-free-mass does fat free mass always equal fat mass how to find the average sd for body fat how to calculate sd of fm what is the measure fm is used for what is the mean and sd of ffm how do you find the average sd of a whole how to figure the mean and sd of the body part