To gym or not to gym?

My body's acccching from 2 days of gym class. My triceps, my biceps, my forearm, my glutes, my thighs, my abs, my calves, heck even my ankles! Urrggh. I was debating under the covers this morning if I should just tread lightly on the Stair Master today. But I think I'll do myself a favour and try tomorrow instead!