Michael Phelps uses this technique. The dolphin kick freestyle was also used by Olympic Champion Michael Klim from Australia, in the final meters of his leadoff 100m freestyle on the relay at the 2000 Olympic Games.
The Rio Games represent Michael Phelps's fifth Olympics, and by charting all of his individual race times from Sydney until now, we can see how his performance has changed over the last 16 years. (Photos: Donald Miralle/Allsport (left) and Mark J. Terrill/Associated Press (right))
Michael Phelps' proud mother pays touching tribute to flag bearer son
Michael Phelps Just Tied an Olympic Record That's Over 2000 Years Old
The photos (inset), taken from 2000 to 2016, show Michael Phelps aged 15 to 31. He carried the Stars And Stripes as he led the American team on Friday during the opening of the Rio Olympics (pictured).
Michael Phelps: The greatest Olympian of them all. He has won 19 medals in his career!!!! 7/31/12 Incredibly, Phelps has 15 gold medals, two silver and two bronze in his legendary Olympic career, which started in 2000.