Source+10

Vorvick, Linda J. "Exercise and Immunity: MedlinePlus Medical Encyclopedia." National Library of Medicine - National Institutes of Health. 15 May 2010. Web. 16 May 2011.

1. Physical activity may help by flushing bacteria out from the lungs (thus decreasing the chance of a cold, flu, or other airborne illness) 2. Exercise sends antibodies and white blood cells (the body's defense cells) through the body at a quicker rate. 3. The increased rate of circulating blood may also trigger the release of hormones that "warn" immune cells of intruding bacteria or viruses. 4. The temporary rise in body temperature may prevent bacterial growth, allowing the body to fight the infection more effectively. 5. Exercise slows down the release of stress-related hormones 6. Exercise increases the chance of illness 7. Exercise not only helps your immune system fight off simple bacterial and viral infections, it decreases your chances of developing heart disease, osteoporosis, and cancer 8. Heavy, long-term exercise (such as marathon running and intense gym training) could actually //decrease// the amount of white blood cells circulating through the body and //increase// the presence of stress-related hormones 9. Studies have shown that the people who benefit most from starting (and sticking to) an exercise program are those who go from a sedentary ("couch potato") lifestyle to a moderately energetic lifestyle 10. Exercise may get rid of cancer causing cells 11. Taking a daily walk or following a simple exercise routine a few times a week may help you feel better. 12. Stress increases the chance of illness 13. While exercise is beneficial, be careful not to "overdo" it. 14. A moderate program can consist of: 15. Exercise can help us feel better about ourselves, just by making us feel more energetic and healthier
 * Bicycling with the children a few times a week
 * Daily 20 - 30 minute walks
 * Going to the gym every other day
 * Playing golf regularly