I did a light workout last night. Legs & shoulders. Squats are out, since doing them causes my right knee to feel funny and go all clicky.
I also did 15 minutes on the stairmaster.
After a few minutes, I thought I was going to die. Notched it back to level 5 and barely made it through.
I was so gassed, I thought I wasn't going to make it home and that I would need to sleep in the locker room.