exerbent
A recumbent stationary exercise bicycle.
I no longer have lower back pain during workouts now that I've switched to using an exerbent instead of a regular exercise bicycle.
exerbating
Masturbating as a means for exercise.
Man 1: Dude where'd you get such huge biceps?
Man 2: I do some exerbating everyday.
Man 2: I do some exerbating everyday.