Then the swimmer pushes off the wall, keeping a streamline position with the hands to the front. Most swimmers dolphin kick after an initial gliding phase.

The finish requires the swimmer to touch the wall with both hands at the same time, in the same horizontal plane. Two main styles of butterfly stroke seen today are: "arm pull up simultaneous with dolphin kick" and "arm pull down simultaneous with dolphin kick".

After first dolphin kick, pull both arms immediately with downward motion. While pulling arms, legs are relaxed, both knees and waist are slightly bent to prepare dolphin kick.

After arms push water backward, pull arms up simultaneous with dolphin kick. In this style, turning point from drowning to floating [ clarification needed ] is at the time of downward arm motion.

After first dolphin kick, raise both arms with relax. While rising arms, bend both knees and waist to send body back to the surface and prepare dolphin kick.

Pull both arms downward while executing dolphin kick. After this sequence, immediately push the water backward. In this style, turning point from drowning to floating is at the time of waist bend.

Two additional styles of butterfly stroke are similar to the two styles above, but without a "second" dolphin kick. Under water kicking on the side is allowed.

It is not permitted to roll onto the back at any time. The legs or the feet need not be on the same level, but they shall not alternate in relation to each other.

A breaststroke kicking movement is not permitted. It shall be permissible for a swimmer to be completely submerged for a distance of not more than 15 metres after the start and after each turn.

By that point, the head must have broken the surface. The swimmer must remain on the surface until the next turn or finish.

From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.

Unsourced material may be challenged and removed. Main article: History of swimming. Olympic champions in men's m butterfly. World long-course champions in men's 50 m butterfly.

World long-course champions in men's m butterfly. Olympic champions in women's m butterfly. World long-course champions in women's 50 m butterfly.

World long-course champions in women's m butterfly. The Guardian. Guardian Media Group. Retrieved 7 September Swimming fastest p.

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