Related Clues:

• Used the pool
• Did laps, perhaps
• Took a dip
• What Ian Thorpe did
• Did one leg of an Ironman competition
• Did the breaststroke, e.g.
• Kept one's head above water?
• Traveled upstream, perhaps
• Went by dugout
• Dog-paddled, perhaps
• Stroked
• Did the crawl, say
• Did the dog paddle
• Began a triathlon
• Emulated Phelps