Don't worry, be happy!

A happy worker is a healthy worker, say scientists who have uncovered the strongest link yet between a positive state of mind and long term health.

Andrew Steptoe and colleagues at University College London asked more than 200 middle-aged civil servants how many happy moments they experienced during a typical day. The happiest people had lower levels of chemicals which are linked to heart disease and type II diabetes, informs the Guardian Unlimited.

According to Scientific American, Andrew Steptoe and his colleagues at University College London studied the emotional and physical well-being of more than 200 middle-aged Londoners recruited for the Whitehall II psychobiology study in the mid-1980s. The participants underwent stress tests and blood pressure and heart rate monitoring, and they were asked to record their feelings of happiness throughout their daily lives. The team found that those people who reported feeling happier more often also had on average lower levels of the stress hormone cortisol, which is linked with hypertension and &to=http:// ' target=_blank>type II diabetes, than did people who recounted fewer moments of happiness.

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