No Jogging, No Equipment Cardio

http://exercise.about.com/library/blcardioblast.htm
A friend of mine recently asked about cardio options without jogging/running. I can totally relate- jogging/running is boring and hard on the joints. I just tried the circuit (see link) at about.com and it was fab! Challenging, gets your heart rate up and if you put on some good tunes, it could feel like you're dancing your heart rate up. Try it out- 25-30min is all it takes. Once you're comfortable with it, run it through twice. I know I will.