big angry hippo said:Jump rope is an excellent exercise. I believe it's just as good, if not, better than running. Really great for your calves, legs, and forearms (especially with the heavy rope). It's also fun and enjoyable to do with other people. Great versatility with the jump rope too, including speed rope, double unders, heavy rope, etc. Try to jump for about 30 mins at least. I used to be pretty good at rope skipping in middle school. =D