Why are track races run counterclockwise?

-Matt A., Fayetteville, AR

Just about every circular sport runs counterclockwise-horse racing, NASCAR, baseball. Why? Who knows? Though most believe it was probably an arbitrary decision and tradition that started with the chariot races at Rome's Circus Maximus stadium in the sixth century BC, experts in biomechanics think there also may be some coincidental physiological benefits. Most people are right-leg dominant, so they use their left leg more for support. When running counterclockwise, you'll take longer strides with your right leg-which allows for more propulsion and speed on the turns.

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