By HeatherJ
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One of the best exercise gadgets—the jump rope—costs less than $15, can travel anywhere. It is so easy a kid can use it. Professional tennis and basketball players, and even runners, are adding jump roping into their training regime, and not just for fun: it strengthens the heart, muscles, and bones, improves agility, coordination, timing, rhythm, and explosive power. Follow these steps before or after your next workout.