Sarcopenia is a common change seen with aging

Sarcopenia is defined as a decrease in lean body mass seen with aging

It is often accompanied with a concomitant increase in fat mass. 

There is usually not a change in total body weight.

Consequences of sarcopenia are:

  decreased in resting energy expenditure

  decreased insulin sensitivity

  diminished muscle strength

  increased risk of disability and falls

  increased risk for mortality