Our happy hour fact to amaze your drinking buddies with.

A person's threshold for pain increases when training in a social setting.

Researchers had members of the Oxford rowing team participate in two typical 45-minute virtual-rowing sessions -- one with teammates and one alone. They then measured the athletes' pain thresholds with a blood pressure cuff tightened around the athletes' arms. The rowers who had worked out in the group could tolerate twice as much pressure and discomfort.

The theory behind these findings is that social interactions up the body's production of endorphins -- the feel-good chemical that lessens the sensation of pain.

Unfortunately, that does not keep the meatball working out next to us at the gym from grunting like he's in labor.

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