Kimberlyn Duncan's likes and frights in the sprints

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Staying healthy in the sprints is tough - race after race, heats after heats. When Kimberlyn Duncan is asked to run so many races throughout the season, it's important to keep her body in tune. Whether it's her bread and butter (200m), an event she's learning (100m), or an event that's still a little scary (400m), she has to toe the line in tip-top shape.