Researchers recently followed 15,000 people for 14 years. They found that those with a healthy lifestyle (exercise, nutritious diet, moderate alcohol, no smoking) had a 67 percent lower risk of dying from heart disease. But if the also got 7 or more hours of sleep a night, they had an 83 percent lower risk.
Scientists asked a group of people at risk for heart disease to complete a test that measured well-being, optimism, and life satisfaction. After following the participants for 25 years, the researchers found that the happiest and most optimistic people had 1/3 of the heart disease risk of the others.
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