i got a rope..and i plan to do a little cardio, when i can't get to the gym
any suggestions to how long? intensity
i was doing it in my basement, straight on the concrete floor..that's the only place in my house where i can do this
is this bad for my knees??
otherwise it felt great..got my heart rate right up
thanks
lindsay

I just started doing the exact same thing Monday... seems to work quite well!