Depression: The Power of Mood

Lifting your spirits can be potent medicine. How to make it work for you

Bill Valvo could sense that something was going very wrong with his health. He had worked for a software-development company in Fairfax, Va., for 10 years following a 22-year hitch with the Air Force, and the pressure was finally too much. "I left to start my own business," says Valvo, now 55, "but I could feel that all the stress was having physiological effects." Sure enough, he was diagnosed with coronary-artery disease and underwent bypass surgery in 1999. But after the operation, he spiraled into a severe depression, which would recede and then return with renewed force. Finally, Valvo's physician put...

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