A. This is one of those questions I've been asked several times. The answer depends on your symptoms and personality.
There is research that shows moderate exercise while you have the rhinovirus (That's the fancy term for a cold!), does not prolong the
symptoms or duration.
A basic rule of thumb... If the symptoms are above the neck (in your head), moderate exercise is ok. If the symptoms are in the chest, it may be best to allow your body to rest.
In his article "Exercise and Illness: Work Out With A Cold?", Dr. Edward R. Laskowski gives the following advice...
"Exercise is usually OK if your signs and symptoms are all “above the neck” – symptoms you may have with a common cold, such as runny nose, nasal congestion, sneezing or minor sore throat. Consider reducing the intensity and length of your workout, though, or you may feel worse. Instead of going for a run, take a walk, for example."
"Don’t exercise if your signs and symptoms are “below the neck” – such as chest congestion, hacking cough or upset stomach."
"Don’t exercise if you have a fever, fatigue or widespread muscle aches."
The Bottom Line...
Light to moderate physical activity will not prolong the symptoms. I have found through personal experience as well as various research that moderate cardio or strength training will prevent muscle loss and release endorphins (feel good hormone). However, if you have mucus, cough or other issues, do everyone in the gym a favor... stay home! Nobody likes to be on a treadmill or piece of equipment with someone hacking up a lung next to them!
*Information compiled from fitnessblackandwhite.com
**Consult your physician before beginning exercise or if symptoms become worse.