Physical activity, protein intake, and appendicular skeletal muscle mass in older men

In the study of the maintenance of physical activity and dietary protein intake would attenuate the age-related decline in total appendicular skeletal muscle mass, indicated that Aging was inversely associated with total appendicular skeletal muscle mass in older men (r = -0.43; slope: -0. 119 +/- 0.039 kg/y; P < 0.01). An effect of age on appendicular skeletal muscle mass persisted after standing height and physical activity were controlled for (r = -0.34; slope: -0.120 +/- 0.052 kg/y; P = 0.03). Furthermore, an effect of age on appendicular skeletal muscle mass persisted after standing height and dietary protein intake per kilogram body mass was controlled for (r = -0.41; slope: -0.127 +/- 0.045 kg/y; P < 0.01)(1).

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(1) "Physical activity, protein intake, and appendicular skeletal muscle mass in older men" by Starling RD, Ades PA, Poehlman ET.