Health: Winter Games

You can still exercise when the mercury dips, but do it carefully

Just because the weather outside is frightful, that's no excuse for slacking off on your physical activity. With much of the U.S. in a deep freeze, however, this is probably a good time to review the rules for exercising in cold weather.

1. DRESS IN LAYERS The greatest danger is hypothermia, a condition in which the body's core temperature drops from 98.6ºF to below 96ºF. Sports doctors recommend that you wear an inner layer made of a material, such as polypropylene, that wicks away moisture so that your perspiration doesn't chill your body. (Don't use cotton, which retains moisture against the...

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