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Stress Relief

When you are stressed, your blood pressure rises, your heart rate increases, and a host of stress hormones are dumped into your blood, says Susan Johnson, director of continuing education at the Cooper Institute for Aerobics Research in Dallas.

Chronic stress can weaken your immune system, making you more susceptible to anything from the common cold to cancer. Walking causes your brain to produce mood-elevating beta-endorphins, and may help prevent you from becoming depressed and anxious.

(Reader's Digest, April 2000, p.40)