Ok my manly man brothers—and you know who you are—this one is for us. We may not have the hand-eye coordination of a big league ball player. We may not have the sprinter’s speed or the shot putter’s power but we can have a pile of wood and the mindset of the lumberjack.

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There may be a reason why lumberjacks are stereotyped as being manly men. New research finds that chopping wood produced 15-percent more testosterone than playing a competitive sport.