Now top athletes do it to stay in shape. Boxers do it almost everyday to keep their weight off. What is it. The same thing we used to love to do as a kid. Jumping Rope! According to studies if we would have kept jumping rope we would be not only be slim but our bodies would be in a healthy condition overall. So, go buy a jumping rope. You can do it indoors or outdoors at anytime of the day. And talk about an economical piece of exercise equipment. Here is a really good article on weight loss and staying in shape by jumping rope.