Aug 19
2008Phelps and his Dolphin Kick
Filed Under (News) by Linen DeFiller on 19-08-2008
Tagged Under : 2008 Beijing Summer Olympics, Berkoff Blastoff, David Bergkoff, Dolphin Kick, Michael Phelps, Rajat Mittal, Sports Celebrities, Swimming, USA Swimming
Does Dolphin Kick really win races ?
Seemingly yes, Phelps has shown it when swimming freestyle he always stayed underwater longer than any of his competitors, but the question really is, did we learn it from Phelps or did he learn it from its history and perfect it, to take advantage of FINA’s rules governing the underwater portion of the race? so what’s all this sudden buzz about dolphin kick ?
IIT Kanpur alum and George Washington University researcher Rajat Mittal has spent the past five years studying Phelps and his dolphin kick - also known as the ‘Berkoff Blastoff’ after the Harvard backstroker who used it the first time at the Olympics 20 years ago.
It all began when Mittal, a professor of mechanical and aerospace engineering, got involved in a US Navy project to study dolphins, thought to be the ultimate swimmers. ”We were asked to understand how fish swim so efficiently,” Mittal recalled in an interview Wednesday, ”and it seemed like a natural extension to apply this to human swimming.”
In collaboration with USA Swimming, Mittal and his colleagues began studying 50 American swimmers, eventually finding that of all of them, Phelps was able to use his body ”in a way that is very, very different from the other athletes…much closer to dolphins than we have seen for any other swimmer.”
And just how does he do that? Phelps is able to straighten his massive size 14 feet to a greater angle (about 15 degrees) than any other swimmer, to reduce resistance. ”Almost 90 percent of all the thrust is coming from the foot,” Mittal explained. ”And the flatter and bigger your foot is, you essentially have a bigger paddle. Michael’s foot size and the angle he generates with it plays a big role in his ability to swim very well.”
So never again laugh at someone with big, flat feet. There’s gold in them!
But foot-size isn’t the only reason behind the Phelps phenomenon. Studies show that his powerful lungs can hold out longer underwater than most swimmers, eliminating the splash and drag that would result if he surfaced early. ”If the body is moving on the surface, it creates waves,” Mittal explained. ”So if you can move underwater instead you can actually eliminate some resistance.”
The Harvard swimmer David Bergkoff figured this out first 20 years ago, using it effectively at the start and the turns to win four Olympic medals, even as other swimmers copied the technique. Swimming officials eventually imposed a limit of 15 meters underwater, a threshold Phelps exploits faster and better than anyone else.
So the crux of the story is if you want to haul gold like Michael Phelps, study Dolphins first and then Michael Phelps






The happy family in Dunn Way, Blacktown, Australia turned into a cementary, as the husband, Sanjay Mehta, is alleged to have murdred his wife and daughter. As per police, Sanjay took members of his family for a drive to the Blue Mountains with the dead bodies of his wife and a girl in the car! He had also instructed other members of his family to lie about the where-abouts of his wife and daughter, for the last few days. Sanjay placed the bodies of wife Jyoti and 9-year-old daughter in the boot of Toyota Camry car and took two other family members for a drive to Echo Point lookout at Katoomba. While the other members were out, Sanjay took the two bodies and threw over the cliff.