Muscle mass increases is not a physical change associated with aging.
With age, bones tend to shrink in size and density, weakening them and making them more susceptible to fracture.
The psychosociological theory of aging can be divided roughly into four component theories: disengagement, activity, life-course, and continuity theories.
To learn more about Aging , here
https://brainly.com/question/17767243?referrer=searchResults
#SPJ2