If you jump rope regularly, you'd have to lose weight!
They incorporate jump ropes in the kick-boxing class I take sometimes, and keeping up w/the jumping pace is SO much harder for me than any of the kicks or punches. I mean, it takes stamina to stand there and jump jump jump over and over again. Whew! And to think I used to jump rope for hours and hours at a time when I was little. No wonder I was a stick!