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Are you _______(去游泳) this afternoon?后面是放go shaking还是going shaking呢?当疑问句前是can、do的话后面的动词是原形还是V-ing形式呢
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going to skate～going to swim如果是用skating那么句子意为：这个下午你正在滑冰吗?显然不通顺了.Go skating意为去滑冰,但题目意思：你这个下午要去滑冰吗?可知滑冰这个动作发生在将来.be going to do表示将要做某事.因此为going to skate.（去滑冰）
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going to swim
扫描下载二维码英语中,他喜欢游泳吗?中的游泳怎么写加ing吗?_百度知道
英语中,他喜欢游泳吗?中的游泳怎么写加ing吗?
我有更好的答案
可以加ing，也可以不加。 例如：Does he like to swim?orDoes he like swimming?
采纳率：92%
swim是动词，meeting是名词。meet是动词，是见面的意思
Does he like swimming？
swimming谢谢采纳！
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我们会通过消息、邮箱等方式尽快将举报结果通知您。From Wikipedia, the free encyclopedia
Swimming is an individual or team sport that requires the use of ones arms and legs to move the body through water. The sport takes place in
or open water (e.g., in a sea or lake). Competitive swimming is one of the most popular
sports, with varied distance events in , , , , and . In addition to these individual events, four swimmers can take part in either a freestyle or medley
Swimming each stroke requires a set of specific techniques, and in competition, there are distinct regulations concerning the acceptable form for each individual stroke. There are also
on what types of , caps, jewelry and injury tape that are allowed at competitions. Although it is possible for competitive swimmers to incur several injuries from the sport -- such as
in the shoulders or knees -- there are also multiple health benefits associated with the sport.
swimming across the . Detail from a painting by .
Evidence of recreational swimming in prehistoric times has been found, with the earliest evidence dating to
paintings from around 10,000 years ago. Written references date from 2000 BC, with some of the earliest references to swimming including the , the , the , , the
and others. In 1538, Nikolaus Wynmann, a German professor of languages, wrote the first book about swimming, The Swimmer or A Dialogue on the Art of Swimming (Der Schwimmer oder ein Zweigespr?ch über die Schwimmkunst).
Swimming emerged as a competitive recreational activity in the 1830s in England. In 1828, the first indoor swimming pool, St George's Baths was opened to the public. By 1837, the
was holding regular swimming competitions in six artificial , built around . The recreational activity grew in popularity and by 1880, when the first national governing body, the
was formed, there were already over 300 regional clubs in operation across the country.
The routes taken by
and T.W. Burgess across the , in 1875 and 1911, respectively.
In 1844 two
participants at a swimming competition in London introduced the front crawl to a European audience. Sir
picked up the hand-over stroke from some South American natives and successfully debuted the
in 1873, winning a local competition in England. His stroke is still regarded as the most powerful to use today.
was the first man to swim the
(between England and France), in 1875. Using the breaststroke technique, he swam the channel 21.26 miles (34.21 km) in 21 hours and 45 minutes. His feat was not replicated or surpassed for the next 36 years, until T.W. Burgess made the crossing in 1911.
Other European countries also established
in 1890 and
in 1896. The first European amateur swimming competitions were in 1889 in . The world's first women's swimming championship was held in
Men's swimming became part of the first modern
in . In 1902, the Australian
introduced freestyle to the Western world. In 1908, the world swimming association,
(FINA), was formed. Women's swimming was introduced into the Olympics in 1912; the first international swim meet for women outside the Olympics was the . Butterfly was developed in the 1930s and was at first a variant of breaststroke, until it was accepted as a separate style in 1952.
set the Olympic records in 2016 for the 400 m and 800 m freestyle.
Competitive swimming became popular in the 19th century. The goal of high level competitive swimming is to break personal or world records while beating competitors in any given event. Swimming in competition should create the least resistance in order to obtain maximum speed. However, some professional swimmers who do not hold a national or world ranking are considered the best in regard to their technical skills. Typically, an athlete goes through a cycle of training in which the body is overloaded with work in the beginning and middle segments of the cycle, and then the workload is decreased in the final stage as the swimmer approaches competition.
The practice of reducing exercise in the days just before an important competition is called . A final stage is often referred to as "shave and taper": the swimmer shaves off all exposed hair for the sake of reducing drag and having a sleeker and more hydrodynamic feel in the water. Additionally, the "shave and taper" method refers to the removal of the top layer of "dead skin", which exposes the newer and richer skin underneath. This also helps to "shave" off mere milliseconds on your time.
World record holder and Olympic gold medalist
in the 400 IM.
Swimming is an event at the , where male and female athletes compete in 16 of the recognized
each. Olympic events are held in a 50-meter pool, called a long course pool.
There are forty officially recognized individual swimmin however the
only recognizes 32 of them. The international governing body for competitive swimming is the Fédération Internationale de Natation ("International Swimming Federation"), better known as .
In , where the events are swum in a body of open water (lake or sea), there are also 5 km, 10 km and 25 km events for men and women. However, only the 10 km event is included in the Olympic schedule, again for both men and women. Open-water competitions are typically separate to other swimming competitions with the exception of the World Championships and the Olympics.
In competitive swimming, four major styles have been established. These have been relatively stable over the last 30–40 years with minor improvements. They are:
In competition, only one of these styles may be used except in the case of the individual medley, or IM, which consists of all four. In this latter event, swimmers swim equal distances of butterfly, then backstroke, breaststroke, and finally, freestyle. In Olympic competition, this event is swum in two distances – 200 and 400 meters. Some
competitions also include the 100-yard or 100-meter IM – particularly, for younger or newer swimmers (typically under 14 years) involved in club swimming, or masters swimming (over 18).
Since the 1990s, the most drastic change in swimming has been the addition of the underwater dolphin kick. This is used to maximize the speed at the start and after the turns in all styles. The first successful use of it was by . At the 1988 Olympics, he swam most of the 100 m backstroke race underwater and broke the world record in the distance during the preliminaries. Another swimmer to use the technique was
at the 1996 Olympics in Atlanta, where he completed almost half of the 100 m butterfly underwater to win the gold medal. In the past decade, American competitive swimmers have shown the most use of the underwater dolphin kick to gain advantage, most notably Olympic and World however currently swimmers are not allowed to go any further than fifteen metres underwater due to rule changes by . In addition, FINA announced in 2014 that a single dolphin kick can be added to the breaststroke pullout prior to the first breaststroke kick.
While the dolphin kick is mostly seen in middle-distance freestyle events and in all distances of backstroke and butterfly, it is not usually used to the same effect in freestyle sprinting. That changed with the addition of the so-called "technical" suits around the
in Rijeka, Croatia in December 2008. There,
set new world records of 44.94 seconds in the , 20.48 seconds in the 50 m freestyle and 22.18 in the 50 m butterfly. Unlike the rest of the competitors in these events, he spent at least half of each race submerged using the dolphin kick.
A simplified diagram of the
long course swimming pool standard, used at the
pools must be 50 metres (160 ft) () long and 25 metres (82 ft) wide, with ten lanes labelled zero to nine (or one
zero and nine (or one and ten) are usually left empty in semi-finals and finals); the lanes must be at least 2.5 metres (8.2 ft) wide. They will be equipped with starting blocks at both ends of the pool and most will have Automatic Officiating Equipment, including touch pads to record times and sensors to ensure the legality of
takeovers. The pool must have a minimum depth of two metres.
Other pools which host events under
regulations are required to meet some but not all of these requirements. Many of these pools have eight, or even six, instead of ten lanes and some will be 25 metres (82 ft) long, making them .
that are set in short course pools are kept separate from those set in long course pools because it may be an advantage or disadvantage to swimmers to have more or less turns in a race.
Competitive swimming, from the club through to international level, tends to have an autumn and winter season competing in short course (25 metres or yards) pools and a spring and summer season competing in long course (50 metre) pools and in open water.
In international competition and in club swimming in Europe, the short course (25m) season lasts from September to December, and the long course (50m) season from January to August with open water in the summer months. These regulations are slowly being brought to competition in North America.
As of right now, in club, school, and college swimming in the United States and Canada, the short course (25 yards) season is much longer, from September to March. The long-course season takes place in 50-meter pools and lasts from April to the end of August with open water in the summer months.
In club swimming in , the short course (25m) season lasts from April to September, and the long course (50m) season from October to March with open water in the summer months.
Outside the United States, meters is the standard in both short and long course swimming, with the same distances swum in all events. In the American short course season, the 500 yard, 1000 yard, and 1650-yard freestyle events are swum as a yard is much shorter than a meter (100 yards equals 91.44 meters), while during the American long course season the 400 meter, 800 meter, and 1500-meter freestyle events are swum instead.
Beginning each swimming season racing in short course allows for shorter distance races for novice swimmers. For example, in the short course season if a swimmer wanted to compete in a stroke they had just learned, a 25-yard/meter race is available to them, opposed to the long course season when they would need to be able to swim at least 50 meters of that new stroke in order to compete.
There are several types of officials, which are needed to manage the competition.
Referee: The referee has full control and authority over all officials. The referee will enforce all rules and decisions of FINA and shall have the final answer to all questions relating to the actual conduct of anything regarding the meet, as well as the final settlement of which is not otherwise covered by the rules. The referee takes overall responsibility for running the meet and makes the final decisions as to who wins each race. Referees call swimmers to the blocks with short blasts of his or her whistle. This is the signal for the swimmers to stand next to their blocks. Then the referee will blow a long whistle that will tell the swimmers to step on the block. For backstroke events, the long whistle is the signal for the swimmers to jump into the water. The referee will then blow another long whistle, signalling the swimmers to grab the gutter or the provided block handle. Finally the referee will hand over the rest to the starter by directing his or her hand to the starter.
Starter: The starter has full control of the swimmers from the time the referee turns the swimmers over to him/her until the race commences. A starter begins the race by saying, "Take your mark." At this point, the swimmers will get into stationary positions in which they would like to start their race. After all swimmers have assumed their stationary position, the starter will push a button on the starting system, signaling the start of a race with a loud noise (usually a beep or a horn) and flash from a strobe light. A starter sends the swimmers off the blocks and may call a false start if a swimmer leaves the block before the starter sends them. A starter may also choose to recall the race after the start for any reason or request the swimmers to "stand", "relax" or "step down" if he or she believes that (a) particular swimmer(s) has gotten an unfair advantage at the start.
Clerk of course: The clerk of course (also called the "bullpen") assembles swimmers prior to each event, and is responsible for organizing ("seeding") swimmers into heats based on their times. Heats are generally seeded from slowest to fastest, where swimmers with no previous time for an event are assumed to be the slowest. The clerk of the course is also responsible for recording and reporting swimmers who have chosen to "scratch" (not swim) their events after they have signed up or qualified to a semifinal or final. The clerk is also responsible for enforcing rules of the swim meet if a swimmer chooses to not show up ("No show" - NS) his or her events.
Timekeepers: Each timekeeper takes the time of the swimmers in the lane assigned to him/her. Unless a video backup system is used, it may be necessary to use the full complement of timekeepers even when automatic officiating equipment is used. A chief timekeeper assigns the seating positions for all timekeepers and the lanes for which they are responsible. In most competitions there will be one or more timekeepers per lane. In international competitions where full automatic timing and video placing equipment is in use timekeepers may not be required.
Inspectors of turns: One inspector of turns is assigned to one or more lanes at each end of the pool. Each inspector of turns ensures that swimmers comply with the relevant rules for turning, as well as the relevant rules for start and finish of the race. Inspectors of turns shall report any violation on disqualification reports detailing the event, lane number, and the infringement delivered to the chief inspector of turns who will immediately convey the report to the referee.
Judges of Stroke: Judges of stroke are located on each side of the pool. They follow the swimmers during their swim back and forth across the pool. They ensure that the rules related to the style of swimming designated for the event are being observed, and observe the turns and the finishes to assist the inspectors of turns.
Finish judges: Finish judges determine the order of finish and make sure the swimmers finish in accordance with the rules (two hands simultaneously for breaststroke and butterfly, on the back for backstroke, etc.)
observes a swimmer breaking a rule concerning the stroke he or she is swimming, the official will report what they have seen to the referee. The referee can disqualify (or DQ) any swimmer for any violation of the rules that he/she personally observes or for any violation reported to them by other authorised officials. All disqualifications are subject to the decision and discretion of the referee.
Those who are disqualified may choose to protest their disqualification . Protests are reviewed by a panel of officials instead of the deck referee or stroke judges who may have made the initial disqualification report.
in their , 1996
Competitive swimwear seeks to improve upon bare skin for a speed advantage and coverage. In 2009, FINA rules and regulations were altered and suits made with polyurethane were banned because they made athletes more buoyant. These rules also banned suits which go above the
or below the knee for men and suits which extend past the shoulders or cover the neck for women.
A swim cap (a.k.a. cap) keeps the swimmer's hair out of the way to reduce drag. Caps may be made of latex, silicone, spandex or lycra.
Goggles keep water and
out of swimmers' eyes. Goggles may be tinted to counteract glare at outdoor pools. Prescription goggles may be used by swimmers who wear corrective lenses.
Rubber fins are used to help kick faster and build strength and technique, but are illegal in a race. They also improve technique by keeping the feet in the proper position while kicking.
Swimmers use drag suits in training to increase resistance. This allows a swimmer to be challenged even more when practicing and let the swimmer feel less resistance when racing. Drag suits are not used in competitive races.
Swimmers use these plastic devices to build arm and shoulder strength while refining hand-pulling technique.
attach to the hand with rubber tubing or elastic material. They come in many different shapes and sizes, depending on swimmer preference and hand size.
A kickboard is a foam board that swimmers use to support the weight of the upper body while they focus on kicking. Kicking is the movement of the legs only which helps to increase leg muscle for future strength.
Often used at the same time as hand paddles, pull buoys support swimmers' legs (and prevent them from kicking) while they focus on pulling. Pull buoys are made of foam so they float in the water. Swimmers hold them in between the thighs. They can also be used as a kickboard to make kicking a little harder.
Ankle bands
Improving balance will minimize the need for this kick to provide an upward, instead of a forward vector, and in some cases completely corrects the kick. Using an ankle band will have the immediate effect of turning off your kick, which then forces you to make efforts to correct your balance. If you are successful in discovering these, then the ankle band has done part of its job.
A snorkel is a plastic device that helps swimmers breathe while swimming. This piece of equipment helps the swimmer practice keeping their head in one position, along with training them for the proper breathing technique of breathing in through the mouth and out the nose. This technique is the opposite of a common runner's breathing pattern, which is in the nose and out the mouth.
Tempo trainer
A beeping clock attached to a swimmers cap or goggles helps maintain a certain arm tempo or speed. As each beep is heard, the next stroke, or cycles of strokes, should be taken.
A type of rubber swimming fins, zoomers are cut off fins with the holes in the bottom. They help make the swimmer kick faster, but at the cost of working harder.
Brands such as , , , and
are popular regular swimwear brands. The most durable material for regular swimming is Polyester. The main difference between competition and regular swimwear is that competition swimwear is tighter and compresses the muscles of the swimmers. Regular swimwear is easier to put on and more comfortable for leisure activities.
Olympic gold medalist
of U.S. walks wearing men's , while an unidentified female swimmer wearing
looks on, 2012
The most used practice swimwear for men includes
and . Males generally swim .
There was controversy after the
in 2008 when many Olympic swimmers broke records an unprecedented number of times using revolutionary swimsuits that covered their entire legs. To highlight the issue, in 2008, 70 world records were broken in one year, and 66 Olympic records were broken in one Olympic Games (there were races in Beijing where the first five finishers were swimming faster than the old world record).
As of January 1, 2010, men are only allowed to wear suits from the waist to the knees. They are also only permitted to wear o they cannot wear briefs underneath jammers. This rule was enacted after the controversy in the Beijing Olympics and Rome World Championships.
Women wear one-piece suits with thicker and higher backs for competition, though two-piece suits can also be worn during practice. Backs vary mainly in strap thickness and geometric design. Most common styles include: racerback, axel back, corset, diamondback, and butterfly-back/Fly-Back. There are also different style lengths: three-quarter length (reaches the knees), regular length (shoulders to hips), and
style (two-piece). As of January 1, 2010, in competition, women must wear suits that do not go past the shoulders or knees.
are used to increase water resistance against the swimmer to help them train for competitions. Other forms of drag wear include nylons, old suits, and T-shirts: articles that increase friction in the water to build strength during training, and thus increase speed once drag items are removed for competition.
Many swimmers also shave areas of exposed skin before end-of-season competitions to reduce friction in the water. The practice gained popularity after the 1956 Olympics, when Murray Rose and Jon Henricks came shaved and won gold medals for Australia. Freshly shaven skin is less resistant when in the water. In addition, a 1989 study demonstrated that shaving improves a swimmer's overall performance by reducing drag.
Wearing drag suits during training also improves mental performance during competitions[]. Drag makes a swimmer feel slower and more resistant during training with the added friction. Then on the day of the competition, a shaven swimmer wearing only a fast competition suit will feel an improvement in how fast and smooth they feel in the water.[]
The disadvantages of using a drag suit include the depletion of proper stroke. This is caused by the swimmer's own fatigue. When the swimmer becomes more fatigued, different muscle groups become more tired. Consequently, the swimmer will try to engage another group of muscle to do the same thing, which can cause the stroke efficiency to drop.[]
Elite and international swimming comprises the highest level of competition available to swimmers, including competitions such as the
Swimming creates a mix of levels, including: fully professional, semi-professional, and amateur. Fully professional swimmers will typically get a salary both from their national governing body and from outside sponsors, semi-professionals a small stipend from their national governing body, and amateurs receive no funding. Outside of these major championships prize money is low – the 2015 FINA World Cup series has a total prize fund of $3,000 per race shared between the top three and the 2014–15 USA Grand Prix Series $1,800 compared to the 2015 World Aquatics Championships fund of $60,000 per race shared between the top eight.
Open water swimming is swimming outside a regular pool, usually in a lake, or sometimes ocean. Popularity of the sport has grown in recent years, particularly since the 10 km open water event was added as an Olympic event in 2005, contested for the first time in the 2008 Olympic Games in Beijing.
New recent technology has developed much faster swimsuits. Full body suits have been banned, but swimmers at the very top levels still wear suits that have been lasered together because stitching creates drag. The disadvantage of these suits is that they are often uncomfortable and tight, and can tear easily if not handled carefully.
The largest Ocean Swim's in terms of numbers of participants are in Australia, with the , Cole Classic and Melbourne Swim Classic all with roughly 5000 swimming participants.
Swimming times have dropped over the years due to superior training techniques and new technical developments.
The first four Olympics were not held in pools, but in open water (1896 – the Mediterranean, 1900 – the Seine river, 1904 – an artificial lake, 1906 – the Mediterranean). The ' freestyle race was the only one ever measured at 100 yards, instead of the usual 100 meters. A 100-meter pool was built for the
and sat in the center of the main stadium's track and field oval. The , held in the Stockholm harbor, marked the beginning of .[]
Male swimmers wore full-body suits until the 1940s, which caused more drag in the water than their modern swimwear counterparts experience. Competition suits now include engineered fabric and designs to reduce swimmers' drag in the water and prevent athlete fatigue. In addition, over the years, pool designs have lessened the drag. Some design considerations allow for the reduction of swimming , making the pool faster. These include proper pool depth, elimination of currents, increased lane width, energy absorbing racing lane lines and gutters, and the use of other innovative hydraulic, acoustic, and illumination designs. There have been major changes in starting blocks over the past years. Starting blocks used to be small, narrow and straight
but through time they have become bigger and wider and nowadays the surface of the block is angled towards the swimming pool. In addition, starting blocks now have a "wedge" which is a raised, slanting platform situated at the rear of the main block. This enables the swimmer to adopt a crouched position at a 90 degrees angle and push off quicker with the rear leg to increase their launch power.
were the first to use the standard 50-meter pool with marked lanes. In the freestyle, swimmers originally dove from the pool walls, but diving blocks were incorporated at the . The
was developed by the 1950s and
were first used in the .
There were also changes in the late 20th century in terms of technique. Breaststrokers are now allowed to dip their heads completely under water to glide, which allows for a longer stroke and faster time. However, the breaststrokers must bring their heads up at the completion of each cycle. In addition, a key hole pull in the breaststroke start and turns has been added to help speed up the stroke. There have been some other changes added recently[] as well. Now off the start and turns, breaststrokers are allowed one butterfly kick to help increase their speed. Backstrokers are now allowed to turn on their stomachs before the wall in order to perform a "flip-turn". Previously, they had to reach and flip backwards and a variation of it, known as a "bucket turn" or a "suicide turn", is sometimes used in individual medley events to transition from backstroke to breaststroke.
The foundation of
in 1908 signaled the commencement of recording the first official . At that time records could be established in any swimming pool of length not less than 25 yards, and records were also accepted for intermediate distance split times from long distance events. Today World Records will only be accepted when times are reported by Automatic Officiating Equipment, or Semi-Automatic Officiating Equipment in the case of Automatic Officiating Equipment system malfunction.
Records in events such as 300 yd, 300 m, ;yd, and ;m freestyle, 400 m backstroke, and 400 m and 500 m breaststroke were no longer ratified from 1948. A further removal of the 500 yd and 500 m freestyle, 150 m backstroke, and 3×100 m medley relay from the record listings occurred in 1952.
In 1952, the national federations of the United States and Japan proposed at the FINA Congress the separation of records achieved in long-course and short-course pools, however it was four more years before action came into effect with the Congress deciding to retain only records held in 50 m pools as the official world record listings.
By 1969 there were thirty-one events in which FINA recognised official world records – 16 for men, 15 for women – closely resembling the event schedule that was in use at the .
The increase in accuracy and reliability of electronic timing equipment led to the introduction of hundredths of a second to the time records from 21 August 1972.
Records in short course (25 m) pools began to be officially approved as "short course world records" from 3 March 1991. Prior to this date, times in short course (25 m) pools were not officially recognised, but were regarded a "world best time" (WBT). From 31 October 1994 times in 50 m backstroke, breaststroke, and butterfly were added to the official record listings.
FINA currently recognises world records in the following events for both men and women.
Freestyle: , , , , ,
Backstroke: , ,
Breaststroke: , ,
Butterfly: , ,
Individual medley:
(short course only), ,
(short course only), , ,
(short course only),
Mixed relays (teams of two men and two women):
(short course only),
(long course only),
(short course only),
(long course only)
— denotes instances that cannot be determined
Backstroke
Breaststroke
under 30 sec
Jessica Hardy
Emma Igelstr?m
under 1 min
Johnny Weissmuller
Dawn Fraser
Thompson Mann
Natalie Coughlin
Roman Sludnov
Lance Larson
Christiane Knacke
Jenny Thompson
under 2 min
Don Schollander
Kornelia Ender
John Naber
Roger Pyttel
Tamás Darnyi
Katinka Hosszú
Mireia Belmonte
under 4 min
Rick DeMont
Federica Pellegrini
Lindsay Benko
László Cseh
under 8 min
Vladimir Salnikov
Mireia Belmonte
under 15 min
Vladimir Salnikov
under 4 min
United States
United States
United States
United States
under 8 min
United States
East Germany
Swimming is a healthy workout that can be done for a lifetime. It is a low-impact workout that has several mental and bodily health benefits, and can be a recreational activity. Swimming builds endurance, muscle strength, and cardiovascular fitness.
The US Census Bureau reports that two and a half hours per week of aerobic physical activity such as swimming can decrease the risk of chronic illnesses. Along with this, swimming is linked to better cognitive function, lower risk of type 2 diabetes, lower risk of high blood pressure, and lower risk of a stroke. People are typically able to exercise longer in water than on land without increased effort, and minimal joint or muscle pain.
Due to continuous rotation and usage, the shoulder (rotator cuff) is the joint most susceptible to injury in swimmers. As opposed to a single incident, injury to the rotator cuff in swimmers is a result of repeated trauma and overuse. The joint is most prone to injury when the arm is repetitively used in a position above the horizontal. This position occurs in each of the four swimming strokes in every cycle of the arms. Of the four muscles and tendons of the rotator cuff, the injury, or tear, is most likely to occur in the tendon of the supraspinatus. Rotator cuff impingement is due to pressure on the rotator cuff from part of the scapula as the arm is raised.
The best way to prevent injury is to diagnose the issue early. Typically, poor technique and excessive use without rest are the primary causes of injury. Through communication between swimmers, coaches, parents, and medical professionals, any issue can be diagnosed prior to more serious injury. Additionally, proper warm-up and strength training exercises should be completed before any rigorous movements.
In treating a rotator cuff injury, the most important factor is time. Due to the nature of the joint being primarily stabilized by muscle and tendon, the injury must be fully healed to prevent recurrence. Returning to swimming or other demanding exercises too soon will likely result in degeneration of a tendon eventually resulting in a rupture. During the rehabilitation period, focus should be placed on rotator cuff and scapular strengthening.
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Coach Suzanne (). . Steelcityendurance.com.
Hines, Emmett. . US Masters Swimming 2015.
Laughlin, Terry. . Active. Active Network 2015.
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Sharp, RL; Costill, DL (October 1989). "Influence of body hair removal on physiological responses during breaststroke swimming". Medicine and science in sports and exercise. 21 (5): 576–80. :.  .
(PDF). FINA 2015.
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– the international governing body.
International
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