Article Source: Runner's World

Written by -  Christopher Percy Collier - June 2009

As runners propel themselves forward, some measure of discomfort is normal (provided it's not a sign of a serious issue; see "Stop Right There," below). Muscles burn. Joints ache. Exhaustion sets in. However, research suggests that our pain threshold is not set at an unmovable level—that the mind can, to some extent, control it. "When I tell an athlete that they can adjust their pain level by using mental techniques, they're amazed," says Raymond J. Petras, Ph. D., a sports psychologist in Scottsdale, Arizona. "They often find that their performance increases dramatically." The following mental tricks—recommended by sports psychologists and used by elite runners—will help you redefine your limits.

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