Testosterone A Factor In Love, War And Even Dominoes

COLUMBIA, Mo. (May 16, 2013)--Male testosterone levels during competition varies depending on the relationships among the competitors and may be related to the formation of alliances in war, - a University of Missouri study finds.

The study, released Thursday, which tracked men on the island of Dominica playing dominoes or cricket, concluded that sporting events can bring camaraderie to a community and fuel rivalries, as testosterone levels rise or fall depending on who is involved.

Anthropology professor Mark Flinn said testosterone levels increased during and after victories over strangers or rivals, but didn't change much when friends competed against each other.

Offering an example, he said a Missouri game against longtime rival Kansas would likely prompt a "huge increase" in testosterone during the game and after a win.

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