Mason Williams is on his junior high school swim team, and he has always been fast at the short distances, but if he wants to compete in the longer races he will need to work on his endurance--so his best friend suggests that he train in the nearby lake.
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Describes flexibility and agility, and discusses the benefits of both. Also offers equipment and safety tips, and information on designing your own workout. Includes color photographs, a glossary, and further resources.