U.S. swimmer Kara Lynn Joyce (Eric Francis/Getty Images)
LONDON -- What makes Olympic swimmers go so fast?
For many, it comes down to talent, training and a special move known as the dolphin kick.
Karyn Greer sat down with engineers from BMW who worked to determine the effectiveness of this swimming move.
PHOTOS | Karyn and Chesley in London
Olympic swimmer and University of Georgia alumna Kara Lynn Joyce agreed to wear sensors on her body while she performed the kick, giving engineers a chance to record her movements and determine the kick's effectiveness.
The engineers concluded that perfecting the dolphin kick could help a swimmer shave whole seconds off his or her time. In fact, the move is so effective that Olympic swimmers are only allowed to use it for the first 15 meters off the pool wall.
Follow Chesley (@chesley11alive) and Karyn (@karyngreer) on Twitter as they report live from the Olympics. Use the hashtag #OlympicsATL to join the conversation.
Other Karyn & Chesley stories from London
Karyn and Chesley kick off their London trip
Karyn and Chesley ride the Tube, London Eye
Karyn interview Bruce Jenner in London
Chesley talks weather with British meteorologists
11Alive brings Random Acts of Kindness to Olympics
Karyn interviews Georgia Olympians Angelo Taylor and DeeDee Trotter
Karyn and Chesley check out the Coca-Cola Beatbox
Chesley explores London's 'green' Olympic Park