Did you know that exercise can prevent colds?
The British Journal of Sports Medicine reports over a 12 week period individuals who said they exercised at least five days a week had a 43% fewer days with an upper respiratory tract infection then individuals who exercised only one day a week.
Although this information is not breaking news (previous studies have indicated similar findings) it helps to promote the concrete evidence that exercise promotes overall better health. Exercise most likely boosts the immune systems providing the body with better coping mechanisms to illness and stress.
The lesson here is not to pass up a day of exercise because you feel you aren't seeing any results externally. Some of the best changes may be those that you don't actually see occurring inside your body.
And now you know.