Men's testosterone levels predict competitiveness

After a man loses a challenge, whether or not he is willing to get back into the game depends on changes in his testosterone levels, according to new research at The University of Texas at Austin.

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<p><a href="http://www.physorg.com/news84473710.html">Men's testosterone levels predict competitiveness</a></p> <p>After a man loses a challenge, whether or not he is willing to get back into the game depends on changes in his testosterone levels, according to new research at The University of Texas at Austin.</p>