What is rest?

I’m supposed to take a “rest” from my workouts today but I feel like popping in my Zumba DVD when I get home and working it out! I skipped my Spin class last night because I am working on a secret santa gift for someone at work that I still haven’t completed and the party is tomorrow! Needless to say I need to get my gift done and Spin class will be waiting for me first thing Saturday morning! What is “rest”…I don’t think I know what that is HA?