March 1999 Issue
Dieters, Get Up and Get Moving or Risk Immune Decline
If you're on a weight-loss program or about to begin one, get active. Not only will exercise help shape up your body, it may also help tone your immune system, say researchers. Studies associate obesity with decreased immune function. That makes overweight people more susceptible to infections and some cancers. Ironically, severe dieting can further impair immunity. Calorie restriction suppresses the activity of natural killer cells, one type of white blood cell that
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