So much for the correlation between stress and weight gain.

A new study from Japan finds that outgoing people are most at risk for being overweight, according to a report from Reuters.

Japanese researchers found a link between weight, body mass index and personality, according to a study published in the Journal of Psychosomatic Research this month.

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More than 30,000 people in northeastern Japan ages 40 to 64 were quizzed about their height and weight, and given a personality test.

After controlling for outside factors, including smoking, extroverted men were found to be 1.73 times more likely to be obese than introverted men. Extroverted women were 1.53 times as likely to be obese than worriers.

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Outgoing people also were more likely to have a body mass index of 25 or higher, which researchers say is indicative of being overweight.