Ever wonder why so many people are told to "take a walk" when they're upset or angry? It turns out that walking is more than just an escape; it actually eliminates stress hormones called catecholamines (generally referred to as adrenaline) from the body. This means that with each step you take, you can burn away stress. In addition, walking reduces muscle tension and increases the production of beta-endorphins, hormones that make you feel great after the exercise. Besides, all the cells in the body start functioning at their highest level of efficiency. In short, when you're stressed out, a walk beats a bar of chocolate any day.