Good improvisers always pay attention to their physical appearance and presence.
Improv theater rehearsals sometimes focus almost exclusively on communication through one’s physical movements and attitudes. Players, for instance, will walk randomly back and forth across the stage as their coach calls out directions that alter their walks. The directions do NOT suggest a physical response (”Your left foot hurts.”) but an emotional one (”You just won the lottery!”) to be reflected in the walk. Each player responds in his or her own way. One player who ‘just won the lottery’ might skip; another will add some bounce to the step or glide to the stride; still another may walk around in a happy daze.