Information about Backstroke
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Backstroke swimming (amateur competition, non-optimal style)
Speed and ergonomics
Backstroke is the second slowest stroke after breaststroke. The maximum swimming speed is around 1.84 meter per second. Due to its position on the back, backstroke uses different muscles in the upper body than other styles.Technique
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Upper view of professional backstroke movement
Arm movement
In backstroke, the arms contribute most of the forward movement. The arm stroke consists of two main parts: the power phase (consisting of three separate parts) and the recovery. The arms alternate so that always one arm is underwater while the other arm is recovering. One complete arm turn is considered one cycle. From the initial position, one arm sinks slightly under water and turns the palm outward start the Catch phase (first part of the power phase). The hand enters downward about ten inches, catching the water.During the power phase the hand follows a semi-circular path from the Catch to the side of the hip. The palm is always facing away from the swimming direction, and the elbow always points downward towards the bottom of the pool. This is done so that both the arms and the elbow can push the maximum amount of water back in order to push the body forward. At the height of the shoulders the upper and lower arms should have its maximum angle of about 90 degrees. This is called the Mid-Pull of the power phase.
The Mid-Pull phase consists of pushing the palm of the hand as far down as possible with the fingers pointing upward. Again, the goal is to push the body forward against the water. At the very end of the Mid-Pull, the palm flaps down for a last push forward down to a depth of 45 cm, creating the Finish of the Power phase. Besides pushing the body forward this also helps with the rolling back to the other side as part of the body movement. During the power phase, the fingers of the hand can be slightly apart, as this will increase the resistance of the hand in the water due to turbulence.
To prepare for the recovery phase, the hand is rotated so that the palms point towards the legs and the thumb side points upwards. At the beginning of the recovery phase of the one arm, the other arm begins its power phase. The recovering arm is moved in a semicircle straight over the shoulders to the front. During this recovery, the palm rotates so that the small finger enters the water first and the palms point outward. After a short gliding phase, the cycle repeats with the preparation for the next power phase.
A variant is to move both arms synchronized and not alternating, similar to an upside down butterfly stroke. This is easier to coordinate, and the peak speed during the combined power phase is faster, yet the speed is much slower during the combined recovery. The average speed will usually be less than the average speed of the alternating stroke.
Another variant is the old style way of swimming backstroke, where the arm movement formed a complete circle in a windmill type pattern. However, this style is nowadays no longer used for competitive swimming, as a lot of energy is spent on pushing the body up and down instead of forward. Furthermore, the added strain on the shoulder is considered less than ideal and can lead to injuries.
It is also possible to move only one arm at a time, where one arm moves through the power and recovery phases while the other arm rests. This is slow, but it is used frequently to teach students the movement, as they have to concentrate on only one arm.
Leg movement
The leg movement in backstroke is similar to the flutter kick in front crawl. They make a small contribution to the forward speed, yet are very significant for stabilizing the body.The leg stroke is also alternating, with one leg sinking down straight to about 30 degree out of the horizontal. From this position the leg makes a fast kick upward, slightly bending the knee at the beginning and then stretching it again in the horizontal. However, there are also frequent variants with four or only two kicks per cycle. Usually, sprinters tend to use 6 kicks per cycle, whereas long distance swimmer may use less.
It is also possible to use a breaststroke kick or a butterfly (dolphin) kick, although this is rare except the butterfly kick after the start and the turns. This dolphin kick is essential for many top athletes because it is the fastest part of the race. It may also constitute the majority of the race. ie(in the 100 yd backstroke the swimmer may kick underwater dolphin for 15 yds per length which equates to as much as 60 yds kicking in a 100 yd race) A great example of this is Olympic gold medalist natalie coughlin. Breaststroke kicks are most comfortable if the arms are used synchronized, as the breaststroke kick has difficulty to compensate for a rolling movement due to alternating arm cycles. The butterfly kick can be done slightly to one side depending on the rolling of the body.
Breathing
Breathing in backstroke is very easy, as the mouth and nose are almost always over water. Competitive swimmers breathe in through the mouth during the recovery of one arm, and breathe out through the mouth and nose during the pull and push phase. This is done to clear the nose of water.Body movement
Due to the asynchronous movement of the arms, there is a roll of the body around its own axis. This is normal and helps swimming effectively. The overall position of the body is straight in the horizontal to reduce drag. Beginners frequently let their posterior sink too low and increase drag, because to avoid this the upper legs have to be moved to the extreme down position at each kick even with a little help by the back and the foot tips have to be fixed in the extreme lower position. And the head is held out of the water to act as a counter-weight.Start
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Backstroke start, waiting for the signal
For the takeoff, the swimmer pushes his hands away from the block, and swings his arms around sideways to the front. At the same time he throws his head to the back. Only a minimal delay afterwards, the swimmer pushes himself away from the wall with his feet. Ideally, the swimmers back is arched during the airborne phase so that only the feet and the hands touch the water while the rest of the body is above the water line. This reduces the drag and allows the swimmer to start faster.
After the start, the swimmer is completely underwater. Due to the increased resistance at the surface, the speed under water may for an experienced swimmer be faster than at the surface. Therefore, most experienced swimmers stay in backstroke competitions under water up to the limit set by FINA to be 15 meter after the start and every turn. Most swimmers swim a butterfly kick under water, as this provides more forward movement than the flutter kick. The underwater phase includes the risk of water entering the nose, which gives an unpleasant feeling. Most swimmers breathe out slightly through the nose to stop water from entering. It is also possible to use a nose clip. Some swimmers can close their nostril with their upper lips.
The swimmer must break the surface before 15 m. The swimmer starts swimming with one arm, followed by the other arm with half a cycle delay. The swimmer continues in regular swimming style, staying on the back for the entire time except the turns. One part of the swimmer must break the surface at any time.
Turn and finish
Approaching the wall has the problem that the swimmer cannot see where he is going. Most competitive swimmers know how many strokes they need for a lane, or at least how many stroke after the signal flags or the change in color of the separating lines. Turning the head is also possible, but slows the swimmer down.When approaching the wall, the swimmer is allowed to turn to the breast and make one push/pull phase with one arm. Next the swimmer makes half a tumble turn forward, resting the feet against the wall. The arms are in the forward position at this time, and the swimmer pushes himself off the wall. Similar to the start, the swimmer can remain up to 15 m under water, with most swimmers using a butterfly kick for speed.
For the finish, the swimmer must touch the wall while lying on his back, less than 90 degrees out of the horizontal.
Competitions
There are three common distances swum in competitive backstroke swimming, both over either a long course (50 m pool) or a short course (25 m pool). The United States also employs short course yards (25 yard pool). Of course, other distances are also swum on occasions.- 50 m Backstroke
- 100 m Backstroke
- 200 m Backstroke
- 100 m Individual Medley (short 25 m pool only)
- 200 m Individual Medley
- 400 m Individual Medley
- 4×100 m Medley Relay
- Prior to the starting signal, the swimmers shall line up in the water facing the starting end, with both hands holding the starting grips. Standing in or on the gutter or bending the toes over the lip of the gutter is prohibited.
- At the signal for starting and after turning the swimmer shall push off and swim upon his back throughout the race except when executing a turn as set forth in SW 6.4. The normal position on the back can include a roll movement of the body up to, but not including 90 degrees from horizontal. The position of the head is not relevant.
- Some part of the swimmer must break the surface of the water throughout the race. It shall be permissible for the swimmer to be completely submerged during the turn, at the finish and for a distance of not more than 15 meters after the start and each turn. By that point the head must have broken the surface.
- During the turn the shoulders may be turned over the vertical to the breast after which a continuous single arm pull or a continuous simultaneous double arm pull may be used to initiate the turn. Once the body has left the position on the back, any kick or arm pull must be part of the continuous turning action. The swimmer must have returned to the position on the back upon leaving the wall. When executing the turn there must be a touch of the wall with some part of the swimmer’s body.
- Upon the finish of the race the swimmer must touch the wall while on the back. The body may be submerged at the touch.
Well known backstroke swimmers
- Aaron Peirsol
United States
- Lenny Krayzelburg United States
- Ryan Lochte United States
- Roland Matthes
East Germany
- Matt Welsh
Australia
- Krisztina Egerszegi Hungary
- Natalie Coughlin United States
- Kirsty Coventry
- Antje Buschschulte
See also
Notes
External links
- Swim.ee: Detailed discussion of swimming techniques and speeds
Styles of SwimmingCompetitive: Backstroke • Breaststroke • Butterfly • Freestyle • Medley Competitive Variations: Front crawl • Total Immersion • Trudgen Recreational: Sidestroke • Snorkeling Swimming is the movement used in water without artificial assistance.History
Drawings from the Stone Age were found in "the cave of swimmers" near Sura, dating back to 2000 B.C. In 1538 Nicolas Wynman, German professor of languages, wrote the first swimming book.
..... Click the link for more information.Fina may refer to:- Fina is the Software System for Financial Analysis
- Fina is the name of Belgian petroleum company Petrofina.
- Fina is the name of a character in the video game Skies of Arcadia.
..... Click the link for more information.Front crawl, also known as The Australian Crawl, is usually regarded as the fastest swimming style developed. It is one of two long axis strokes, the other being the backstroke.
..... Click the link for more information.Breaststroke is a swimming style swum on the breast. It is the most popular recreational style due to its stability and the ability to keep the head out of the water at all times. In most swimming classes, beginners learn either the breaststroke or the front crawl first.
..... Click the link for more information.turbulence or turbulent flow is a flow regime characterized by chaotic, stochastic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and velocity in space and time.
..... Click the link for more information.The butterfly, (fly for short) is a swimming stroke swum on the breast, with both arms moving simultaneously. The butterfly kick was developed separately, and is also known as the "dolphin kick".
..... Click the link for more information.In human anatomy, the shoulder comprises the part of the body where the arm attaches to the torso. It is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons.
..... Click the link for more information.Bronze 2004 Athens[1] 100 m freestyle
Gold 2004 Athens 100 m backstroke
Silver 2004 Athens 4 x 100 m freestyle relay
Silver 2004 Athens 4 x 100 m medley relay
Gold 2004 Athens 4 x 200 m freestyle relay
World Championships
..... Click the link for more information.Medley is a combination of four different swimming styles into one race. This race is either swum by one swimmer as Individual Medley (IM) or by four swimmers as a Medley Relay.
..... Click the link for more information.Medal record
Aaron Peirsol
Men’s Swimming
Competitor for United States
Olympic Games
Gold 2004 Athens[1] 100m Backstroke
Gold 2004 Athens 200m Backstroke
Gold 2004 Athens 4x100m Medley
Silver
..... Click the link for more information.Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
..... Click the link for more information.Competitor for United States
Men’s Swimming
Olympic Games
Gold 2004 Athens 4x100m Medley
Gold 2000 Sydney 100m Backstroke
Gold 2000 Sydney 200m Backstroke
Gold 2000 Sydney 4x100m Medley
Pan Pacific Championships
..... Click the link for more information.Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
..... Click the link for more information.Competitor for United States
Olympic Games
Gold 2004 Athens[1] 4x200m Freestyle
Silver 2004 Athens 200m Medley
World Championships
Bronze 2005 Montreal[2] 200m Backstroke
Bronze 2005 Montreal 200m Medley
..... Click the link for more information.Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
..... Click the link for more information.Competitor for East Germany
Men’s Swimming
Olympic Games
Gold 1968 Mexico City 100m Backstroke
Gold 1968 Mexico City 200m Backstroke
Silver 1968 Mexico City 4x100m Medley
Gold 1972 Munich 100m Backstroke
Gold
..... Click the link for more information.German Democratic Republic (GDR; German: Deutsche Demokratische Republik, DDR; commonly and informally known in English as East Germany
..... Click the link for more information.Competitor for Australia
Olympic Games
Silver Sydney 2000[1] 100 m backstroke
Silver Sydney 2000 4x100 m medley
Bronze Sydney 2000 200 m backstroke
World Championships
Gold 1998 Perth 4x100 m medley
Gold
..... Click the link for more information.Anthem
Advance Australia Fair [1]
Capital Canberra
Largest city Sydney
..... Click the link for more information.- The native form of this personal name is Egerszegi Krisztina. This article uses the Western name order.
Olympic medalist
Krisztina Egerszegi
Medal record
Competitor for Hungary
Women’s Swimming
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none
Historically Regnum Mariae Patronae Hungariae (Latin)
"Kingdom of Mary the Patroness of Hungary"
Anthem
Himnusz ("Isten, áldd meg a magyart")
..... Click the link for more information.Bronze 2004 Athens[1] 100 m freestyle
Gold 2004 Athens 100 m backstroke
Silver 2004 Athens 4 x 100 m freestyle relay
Silver 2004 Athens 4 x 100 m medley relay
Gold 2004 Athens 4 x 200 m freestyle relay
World Championships
..... Click the link for more information.Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
..... Click the link for more information.Kirsty Coventry
Personal information
Full name: Kirsty Leigh Coventry
Nationality:
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..... Click the link for more information.Bronze Atlanta 1996 4x100 m freestyle relay
Bronze Sydney 2000[1] 4x200 m freestyle relay
Bronze Athens 2004[2] 200 m backstroke
Bronze Athens 2004 4x100 m medley relay
Bronze Athens 2004 4x200 m freestyle relay
..... Click the link for more information.Competitor for Japan
Women’s Swimming
Olympic Games
Bronze Athens 2004[1] 200 m backstroke
World Championships
Bronze 2005 Montreal[2] 200 m backstroke
Bronze 2007 Melbourne[3] 100 m backstroke
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..... Click the link for more information.Medal record
Laure Manaudou in 2005.
Competitor for France
Women's swimming
Olympic Games
Gold 2004 Athens[1] 400m Freestyle
Silver 2004 Athens 800m Freestyle
Bronze 2004 Athens 100m Backstroke
..... Click the link for more information.Motto
Liberté, Égalité, Fraternité
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"
..... Click the link for more information.World records in swimming are ratified by the International Swimming Federation.Current world records
All records were achieved in finals unless otherwise specified.
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- Antje Buschschulte
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