Having a glass "half-fulll" outlook could help keep your heart healthy.
A new study shows people who are optimistic may be less likely to suffer a heart attack or stroke, and more likely to live longer.
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Other studies have shown pessimism, depression and loneliness have a negative effect on health.
So this is showing the opposite side.
And studies show whether you look on the bright side or not is partly genetic.
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But it can also be learned.
You can tweak your mindset to focus more the positive than the negative to reap the benefits.