Running is a great form of exercise because it uses virtually every muscle group in your body. Many misinformed individuals will tell you that only your legs are used when you run. This is entirely false. By running daily, you actually engage and work out your entire body. It is a great way to increase core strength, as well as develop abdominal muscles. Also, if you are trying to get rid of remaining body fat, running is known to literally cause that fat to melt off your body. How many marathoners do you know of that have weight issues? Women, of course, should invest in a shock absorber sports bra when taking up running.