Lots of people inaccurately believe that skinny joggers are healthy runners. A jogger doesn't intend to be way too much obese, but you do not wish to be underweight, either. But just because you are overweight is no reason to not run. Joggers that are slightly overweight will certainly have all the power that they need to run hard. They are also at little threat for injury. A little undernourished. If you are not eating sufficient, your body will break down your muscle for power given that it doesn't have food for gas. This may trigger you to not have the power that you need for your runs. Greatly underweight. So, make sure that you are not undernourished or lugging around excessive extra weight. There are health dangers with both.