I want to not only exercise my upper body, but my legs as well.
However, whenever I do squats I hear my left knee 'clicking'.
Someone posted that swimming is a good exercise, but I'm not so sure about that.
I've tried swimming before, but found running and jump-roping to be far more effective when I'm trying to lose weight.
Then again, I have a bad knee, so I can't just keep running or jumping.