Muscle mass and strength. Muscle mass is the primary determinant of strength Obese individuals have higher lean mass therefore are stronger than thinner people Men have proportionally more lean than women thus are stronger at the same weight
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Nm of torqueper cm2 muscle area
Less More Most
Histochemical Staining of Neutral Fat Content within Skeletal Muscle Fibers
Muscle area and attenuation are both inversely associated with age: The Health ABC Study
Mid-thigh attenuation (HU)
Mid-thigh CSA (cm2)
Goodpaster, BH. J Appl Physiol 2001;90:2157-2165.
Lower extremity function is worse with higher fat and lower muscle area – Health ABC
Tertiles of mid-thigh muscle area
Visser M, et al, JAGS, in press
FlexionThe role of exercise in the prevention of sarcopenia
Knee Strength (kg)
Weeksof Resistance Training
Frontera et al. J. Appl. Physiol., 1988