good, old push up
lifting a box, dumbells, etc with varying weights
jumping
throwing various sized objects (where objects may be balls, skulls, maces, etc)
running with skin (i.e., butt, man-boobs, beer-gut) jiggle
breathing
REALLY, REALLY GOOD mocap examples
different skin -- would require flesh-sculpting program, or procedurally making fatter/thinner
