It's a widely excepted notion that exercising and keeping in shape will reduce your risk of getting sick, but nothing has been previously documented to demonstrate whether working out while suffering from a cold would reduce or intensify the symptoms.

The common cold affects us all, with the average American getting sick up to six times a year, but will exercising when you're not feeling well, increase or decrease your ability to battle the illness, and reduce symptoms?

The study, headed by Thomas G. Weidner, Ph.D., Ball State University in Munice Indiana, involved 50 moderately fit student volunteers, who were divided randomly into two groups: exercising and non-exercising. Each volunteer was injected with the cold germs, and tracked for a ten-day period.

The subjects all kept a daily log of physical activity. The exercise group worked out either by running, biking or using a step machine for 40 minutes every day, at no more than seventy per cent of their maximum capacity (measured by heart rate reserve).

Upon completion of the study and after analysis of exercise data, symptom severity, and actual mucous weight measurements, there was shown to be no significant difference in

The study revealed that exercising at a moderate intensity level does not intensify cold symptoms or compromise the immune system. It seems that a moderate level of intensity is not enough to alter immune response.

Reader beware, high intensity exercise such as heavy weight lifting or high intensity aerobic training has been shown to have a negative impact on the immune system during a cold or any respiratory infection.

Symptom to Exercise Guidelines:

Runny nose, sneezing, scratchy throat only Safe to exercise at low intensity levels.

Fever, dry cough, sore muscles, vomiting, diarhrea Exercise not recommended, resume more intense physical activity when cold, or infection is gone.

About The Author

Michael Stefano is a captain on the New York City Fire Department, as well as author of The Firefighter's Workout Book, The 30-minute-a-day, Train-for-life Program for Men and Women. He is also managing editor, and writer of many articles on health and fitness at www.firefightersworkout.com, (where you can sign up for a FREE Train For Life Newsletter). Michael Stefano's articles have appeared on such internet giants as America On Line, Yahoo!, and eDiets.com