If you've ever been having a bad day or things aren't going your way and you have an urge to just leave and take a walk it is because there is a response in our bodies when we exercise that can help us feel better.

Dr. Jim LaValle is the author of 'Cracking the Metabolic Code' and the clinical director for the Pro Football Hall of Famer performance health program. He explains getting that heart rate up releases serotonin, a natural chemical in our bodies that makes us feel good.

A few weeks ago we heard from Dr. LaValle regarding the lawsuit over Skittles and the challenge in court over their appropriateness for human consumption. Dr. LaValle says one way to reset your body's glucose response is to exercise.

Dr. LaValle points you don't have to be in a weight room under a bench press or pushing out dumbbell exercises for a moderate workout. He encourages people to just walk in their neighborhoods for 30-45 minutes at a time and that is ideal moderate exercise.