The 'exert' group
These verbs are concerned with doing something with a great deal of effort, enthusiasm, or commitment.
apply assert commit exert kill push stir burn out wear out
The stresses of war might have induced many a man to live on the job, burn himself out and go to an early grave.
I found I was having a hell of a good time with various girlfriends without committing myself.
I taught there for five years and I killed myself over the students because they just needed so much.
It's not a good idea to exercise on a full stomach, nor is it good to exert yourself if your stomach is empty.