Expert QA

Can I exercise if I have a cold or the flu?

By Michael Castleman for Live Right Live Well

It's not a good idea. When you have the flu -- marked by sudden fever, muscle aches and physical collapse -- there's no way you can exercise. You simply don't have the energy. Plus, it's never a good idea to work out when you have a fever. So don't try to exercise, advises Pamela Rockwell, D.O., a clinical assistant professor in the department of family medicine at the University of Michigan. In fact, don't exercise for a week or maybe longer. Wait until your temperature has returned to normal, your muscle aches have subsided and you feel well on your way to recovery. Then start with light workouts. If you usually run three miles, start with walking for 20 minutes. If you usually do a strenuous, hour-long workout at the gym, start with a light workout for 20 minutes. As you feel yourself returning to normal energy and stamina, slowly increase your workouts until you can comfortably return to your pre-flu routine.

Colds, on the other hand, rarely cause fever or muscle ache. It's often possible to exercise when you have a cold -- but it's still not a good idea, says David C. Nieman, Dr.P.H., director of health promotion at Appalachian State University, in Boone, N.C., and a fellow of the American College of Sports Medicine. Even though the common cold is a "minor" illness, it still takes considerable effort for the body to combat the infection. That's why colds cause fatigue. So while you may not need to climb into bed, it's still prudent to take it easy for a few days until you feel your energy returning. Feel free to take walks or engage in light stretching. But don't push yourself. As you begin to feel better, slowly return to your usual exercise program.

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