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The Straightness Backstroke Kick Makes Fast Speed and Increased Lactate Acid. A Case Study Using 3-Times Olympian



Author(s)

Takahisa Ide, William F. Johnson, Yutaka Yoshimura, Noriko Inada and Sadafumi Takise

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DOI:10.17265/2332-7839/2017.02.003

In this study, we assess the effectiveness of utilizing a straight knee kick in the backstroke with regard to the overall time, max speed, and distance per stroke when using a straight knee butterfly technique. We analyzed freestyle kick of knee angles from 7-Olympic medalists, 1970’s S-shaped pulling pattern stroke was used with a bending knee freestyle kick. The straight knee kick used in butterfly competitions resulted in improvements from 54.74 to 51.00 in Men’s 100-meter butterfly and from 23.43 to 23.02 in Men’s 50-meter butterfly. Using a straight knee kick in backstroke competitions resulted in improvements from 1:01.74 to 1:00.55 in the 100-meter backstroke event. Increases in performance speed, max speed and distance per stroke among three elite level swimmers are highly correlated to duration of the kick resistance, and straight knee kick in backstroke. The straight knee kick also resulted in an increase in lactate acid. 

Backstroke, straightness kick, lactate acid, Olympian.