Related Clues:

• Kept one's head above water
• Crossed the Rubicon, maybe
• Did one-third of a triathlon
• Went for a dip
• Moved at a crawl?
• Crawled
• Did laps in a pool
• Dog-paddled
• Completed part of a triathlon
• Performed one-third of a triathlon
• Went from bank to bank?
• Did laps, say
• Did laps
• Was in a meet, maybe
• Used a scissors kick