1. Physical activity helps you lose weight by burning calories, boosting resting metabolism and buffering you from bone and muscle loss that can result if you diet alone.
2. High levels of physical activity can decrease your risk of colon cancer by 40-50%.
3. Exercise helps you get better sleep. In one study, people who walked more than 6 blocks a day had 1/3 fewer insomnia problems than their less active cohorts.
4. Walking 30 minutes 5 days a week can increase your lifespan by one and a half years. Make that running and it may add up to 4 years. Remember it is never too late to increase longevity.
5. Half-hour aerobic sessions 3-5 times a week have been shown to cut symptoms of mild to moderate depression nearly in half. One study suggests that exercise can be as effective as drugs in treating major depressive disorders.
6. Brisk walking for just 1-2 hours a week can reduce the risk of breast cancer in postmenopausal women by nearly 20%. And for those who already have the disease, walking 3-5 hours a week may reduce the chance of dying from it by as much as 50%.

You are just one workout away from a good mood.