BUTTERFLY BUTTERFLY STROKESTROKE

HISTORY HISTORY 1933 Henry Myers swam a butterfly stroke 1933 Henry Myers swam a butterfly stroke

in competition at the Brooklyn Central in competition at the Brooklyn Central YMCA in late 1933 .YMCA in late 1933 .

butterfly style evolved from the butterfly style evolved from the breaststroke. breaststroke.

In 1934 Armbruster allegedly refined a In 1934 Armbruster allegedly refined a method to bring the arms forward over the method to bring the arms forward over the water in a breaststroke. He called this water in a breaststroke. He called this "new" style "butterfly". "new" style "butterfly".

in 1935, Jack Sieg a swimmer also from in 1935, Jack Sieg a swimmer also from the University of Iowa developed a kick the University of Iowa developed a kick technique involving swimming on his side technique involving swimming on his side and beating his legs in unison, similar to a and beating his legs in unison, similar to a fish tail, and then modified the technique fish tail, and then modified the technique afterward to swim it face down. He called afterward to swim it face down. He called this style this style Dolphin fishtail kickDolphin fishtail kick..

John Arthur Stephens John Arthur Stephens Dr Philip Mcallister -claimed to have Dr Philip Mcallister -claimed to have

invented the stroke almost 8 years before invented the stroke almost 8 years before David Armbruster. David Armbruster.

1938, almost every breaststroke swimmer 1938, almost every breaststroke swimmer was using this butterfly style, yet this was using this butterfly style, yet this stroke was considered a variant of the stroke was considered a variant of the breaststroke until 1952 breaststroke until 1952

The 1956 Summer Olympics were the first The 1956 Summer Olympics were the first Olympic games where the butterfly was Olympic games where the butterfly was swum as a separate competitionswum as a separate competition

MOVEMENTSMOVEMENTS

Arm movement-Arm movement-The butterfly stroke has three major parts, The butterfly stroke has three major parts,

the pull, the push, and the recovery. the pull, the push, and the recovery.

At the beginning the hands sink a little bit At the beginning the hands sink a little bit down with the palms facing outwards and down with the palms facing outwards and slightly down at shoulder width, then the slightly down at shoulder width, then the hands move out to create a Y .hands move out to create a Y .

The pull movement follows a semicircle The pull movement follows a semicircle with the elbow higher than the hand and with the elbow higher than the hand and the hand pointing towards the center of the the hand pointing towards the center of the body and downward. body and downward.

Do not form the traditionally taught Do not form the traditionally taught "keyhole" when using this stroke, as it "keyhole" when using this stroke, as it disrupts the flow and speed of the stroke. disrupts the flow and speed of the stroke. The arms should be pushed straight back The arms should be pushed straight back after the Y is formed. after the Y is formed.

LEG MOVEMENTLEG MOVEMENT the leg movement is similar to the leg the leg movement is similar to the leg

movement in the front crawl except the movement in the front crawl except the legs are synchronized with each other, legs are synchronized with each other, and it uses a wholly different set of and it uses a wholly different set of muscles.muscles.

The shoulders are brought above the The shoulders are brought above the surface by a strong up and medium down surface by a strong up and medium down kick, and back below the surface by a kick, and back below the surface by a strong down and medium up kick strong down and medium up kick

BREATHINGBREATHING

there is only a short window for breathing there is only a short window for breathing in the butterfly. If this window is missed, in the butterfly. If this window is missed, swimming becomes very difficult. swimming becomes very difficult. Optimally, a butterfly swimmer Optimally, a butterfly swimmer synchronizes the taking of breaths with the synchronizes the taking of breaths with the undulation of the body to simplify the undulation of the body to simplify the breathing process; doing this well requires breathing process; doing this well requires some attention to butterfly stroke some attention to butterfly stroke technique. technique.

Normally, a breath is taken every other Normally, a breath is taken every other stroke. This can be sustained over long stroke. This can be sustained over long distances. Often, breathing every stroke distances. Often, breathing every stroke slows the swimmer down. slows the swimmer down.

Other intervals of breathing practiced by Other intervals of breathing practiced by elite swimmers include the "two up, one elite swimmers include the "two up, one down" approach in which the swimmer down" approach in which the swimmer breathes for two successive strokes and breathes for two successive strokes and then keeps their head in the water on the then keeps their head in the water on the next stroke, which is easier on the lungs next stroke, which is easier on the lungs

BODY MOVEMENTBODY MOVEMENT

Swimming butterfly is difficult if the core is Swimming butterfly is difficult if the core is not utilized, and correct timing and body not utilized, and correct timing and body movement makes swimming the butterfly movement makes swimming the butterfly much easier. The body moves in a wave-much easier. The body moves in a wave-like fashion, controlled by the core, and as like fashion, controlled by the core, and as the chest is pressed down, the hips go up, the chest is pressed down, the hips go up, and the posterior breaks the water surface and the posterior breaks the water surface and transfers into a fluid kick. and transfers into a fluid kick.

During the push phase the chest goes up During the push phase the chest goes up and the hips are at their lowest position. In and the hips are at their lowest position. In this style, the second pulse in the cycle is this style, the second pulse in the cycle is stronger than the first pulse, as the second stronger than the first pulse, as the second pulse is more in flow with the body pulse is more in flow with the body movement. movement.

Although butterfly is very compatible with Although butterfly is very compatible with diving, the resulting reduction in wave drag diving, the resulting reduction in wave drag does not lead to an overall reduction of does not lead to an overall reduction of drag. In the modern style of the Butterfly drag. In the modern style of the Butterfly stroke one does only little vertical stroke one does only little vertical movement of the body. movement of the body.

STARTSTART

Butterfly uses the regular start for Butterfly uses the regular start for swimming. After the start a gliding phase swimming. After the start a gliding phase follows under water, followed by dolphin follows under water, followed by dolphin kicks swim under water. Swimming under kicks swim under water. Swimming under water reduces the drag from breaking the water reduces the drag from breaking the surface and is very economical. Rules surface and is very economical. Rules allow for 15 m of underwater swimming, allow for 15 m of underwater swimming, before the head must break the surface, before the head must break the surface, and regular swimming begins .and regular swimming begins .

TURN AND FINISHTURN AND FINISH

both hands must simultaneously touch the both hands must simultaneously touch the wall while the swimmer remains swimming wall while the swimmer remains swimming face down. The swimmer touches the wall face down. The swimmer touches the wall with both hands while bending the elbows with both hands while bending the elbows slightly slightly

One hand leaves the wall to be moved to One hand leaves the wall to be moved to the front underwater. At the same time the the front underwater. At the same time the legs are pulled closer and moved legs are pulled closer and moved underneath of the body towards the wall. underneath of the body towards the wall.

The second hand leaves the wall to be The second hand leaves the wall to be moved to the front over water. It is moved to the front over water. It is commonly referred to as an "over/under commonly referred to as an "over/under turn or an "open turn turn or an "open turn

Then the swimmer pushes off the wall, Then the swimmer pushes off the wall, keeping a streamline position with the keeping a streamline position with the hands to the front. Similar to the start, the hands to the front. Similar to the start, the swimmer is allowed to swim 15m swimmer is allowed to swim 15m underwater before the head must break underwater before the head must break the surface. Most swimmers dolphin kick the surface. Most swimmers dolphin kick after an initial gliding phase. after an initial gliding phase.

THANK YOU……….THANK YOU……….

MICHAEL MAGNO MICHAEL MAGNO

BSED MAPEHBSED MAPEH