(1) freestyle
1, any stroke can be used in freestyle competition.
2. When you turn around and reach the finish line, you can touch the pool wall with any part of your body.
(2) backstroke
1. Facing the starting end, athletes should grasp the handshakers at both ends and their feet (including toes) should be underwater. It is forbidden to trample in or on the sink, and it is also forbidden to hook your toes on the edge of the sink.
2. After starting and turning, the athlete should push away from the pool wall and lie on his back during the whole swimming process. Athletes must lie on their backs all the time except turning around. The supine posture allows the body to rotate, but it must be kept in a supine posture less than 90 degrees from the horizontal plane. The position of the head is not limited by this.
3. During the whole swimming process, a certain part of the athlete's body must be exposed to the water. During the turn, the athlete is allowed to completely dive into the water. However, at the start and after each turn, the swimmer's diving distance shall not exceed15m, and the athlete's head must be above the water before15m.
4. In the process of turning, when the athlete's shoulder rotates beyond the vertical plane, he can do a continuous single-arm paddling or double-arm paddling at the same time, and start turning over before the end of the action. Once you change your supine posture, you are not allowed to do water or paddling that has nothing to do with continuous turning. Athletes must push away from the pool wall in a supine position. When turning, a certain part of the athlete's body must touch the wall.
When the athletes reach the finish line, they must touch the wall in supine position.
(3) breaststroke
1, after starting and turning around, from the first arm movement, keep your body in a prone position with your shoulders parallel to the water.
2. All movements of arms and legs should be carried out at the same time, and there should be no alternate movements on the same plane.
3, hands should be in the water, underwater or chest water at the same time, and in the water or underwater back stroke. Except for the last movement, the elbow must not be above the water during the complete movement of the arm. Except for the first stroke and every turn after departure, you can't stroke beyond the arm line with both hands.
4. During kicking, the feet must be everted, and it is not allowed to cut the clip, kick the water alternately up and down or kick the water downward like a dolphin. As long as you don't do the downward dolphin kick, you are allowed to put your feet out of the water.
5. When turning to the finish line, both hands should touch the wall at the same time on the water surface, water surface or underwater, and the first two shoulders should be parallel to the water surface. After the last backward stroke before touching the wall, the head can dive into the water, but in a complete or incomplete match before touching the wall, the head should be partially exposed to the water.
6. In each complete action cycle completed in the order of one stroke and one kick, a certain part of the athlete's head should be exposed to the water. Only at the beginning and after each turn, the athlete can draw his arm back to his leg and kick with his whole body submerged in the water. However, before the second stroke to the widest point and the inward stroke with both hands, the head must be above the water.
(4) butterfly stroke
1, except when turning, the body must always be prone. From the first arm movement after starting and turning, to the next turning or reaching the finish line, both arms should be parallel to the water surface. You are not allowed to turn to the supine position at any time.
2. Both arms must swing forward on the surface of the water at the same time, and at the same time paddle down under the water.
3, the action of two feet must be carried out at the same time, allowing two legs and two feet to do water movements at the same time on the vertical plane. Legs or feet may not be on the same horizontal plane, but they are not allowed to move alternately.
4. When turning to the finish line, both hands should touch the wall at the same time on the water surface, water surface or underwater, and the first two shoulders should be parallel to the water surface.
5. At the beginning and after each turn, athletes are allowed to do one or more strokes and one underwater stroke. This stroke must make the body surface.
(5) medley
1. The competition sequence of individual medley is as follows:
(1) butterfly, (2) backstroke, (3) breaststroke and (4) freestyle (any stroke except backstroke, breaststroke and butterfly).
2. The medley relay shall be carried out in the following order:
(1) backstroke, (2) breaststroke, (3) butterfly, (4) freestyle (any stroke except backstroke, breaststroke and butterfly).
3. In individual medley and medley relay events, from backstroke to breaststroke, athletes must touch the pool wall in backstroke posture, and then turn their shoulders out of the vertical plane.
Second, set out for the swimming competition.
(1) freestyle, breaststroke and butterfly events must start from the starting platform, and backstroke events must be carried out in the water. After hearing the referee's long whistle signal, the athlete should stand on the starting platform, and the distance between his feet and the front of the starting platform is equal; Backstroke swimmers enter the water.
When the referee gives the second long whistle, the backstroker should swim back to the end of the pool quickly and get ready for departure; The backstroker is ready to go into the water. When all athletes have a rest, the starter should give a "start signal" (firing a gun, whistling, electric whistle or password). Athletes can't start until they hear the "start signal".
(2) If an athlete starts before giving a "start signal", it will be judged as code start. When starting for the first time, the starter should recall the athletes and organize a new start. After the first foul, no matter which player fouls, he will be disqualified or admitted.
If the athletes are found to be scrambling for the code after sending out the "departure signal", the competition will continue and the athletes who violate the rules will be disqualified after the competition. If it is found that the athletes have mastered the code before sending out the "departure signal", the "departure signal" will not be sent out and the athletes who steal the code will be disqualified.
(3) After the starter discovers that the athlete violates the rules or the referee judges that the athlete violates the rules and blows the whistle, the starter shall continuously issue a recall signal until the athlete is recalled.
If the referee's mistake or equipment failure causes the player to foul, the starter will recall the player to start over, which will not be regarded as a code grab foul.
Three. Swimming competition and foul
(1) Athletes must finish the race on their own track, otherwise it will be considered a foul.
(2) Anyone who swims out of this lane or interferes or hinders other athletes in other ways shall be disqualified.
(3) If the disturbed or hindered athletes have achieved excellent results due to a sports foul, they should be allowed to make up the match or directly participate in the finals. If the above situation occurs in the final, the group will have to play again (except for the foul players).
(4) During the competition, the athlete must make a certain part of his body contact the pool wall when he turns around. Turn around must be done from the wall of the pool, otherwise it will be considered a foul.
(5) Except freestyle standing at the bottom of the pool, other swimming strokes (including freestyle) are not allowed to cross or walk, otherwise it will be considered a foul.
(6) During the competition, athletes are not allowed to use or wear any devices (such as hands, fins, etc.). , but goggles can be worn) is good for their speed and buoyancy, otherwise it is a foul.
(7) Each relay team should have four players, and any player who fouls in the relay race will be counted as a team foul. Any relay athlete can only take part in one relay race.
(8) In the relay race, if the previous athlete of the team fails to touch the pool wall, and then the next athlete leaves the stage, it shall be regarded as a foul. If an athlete returns before swimming out of the pool and touches the pool wall with any part of his body, it is not a foul.
(9) After swimming in the first three relay races, the athletes should leave the swimming pool as soon as possible without affecting other athletes' races, and must not touch the automatic timing devices in other lanes, otherwise a foul will be imposed. When all the athletes reach the finish line, they should leave the swimming pool as soon as possible, or they will be convicted of a foul.
(10) During the competition, athletes who have not participated in the competition should be disqualified from the next competition if they enter the water before all the competitors have finished swimming. In the relay race, before all the athletes in each team have finished swimming, if other relay athletes enter the water, the relay athletes will be disqualified.
(11) After the preliminaries, when two or more athletes have equal scores and exceed the original number of finalists, the method for determining the finalists is as follows:
1. If the automatic timing device is used, after the preliminaries, athletes with the same scores in the same group or different groups must compete again, and the finalists will be determined according to the rankings after the rematch.
2. If manual timing is used, after the preliminaries, if the athletes in the same group have the same performance, the competition will not be repeated, and the finalists will be determined according to the preliminaries. If athletes in different groups perform the same, the rematch athletes shall be determined according to the following three situations, and the finalists shall be determined according to the rankings after the rematch.
(1) After a preliminary round, two or more groups of athletes performed the same. If it is necessary to determine a player to participate in the finals, the player with the highest ranking in each group will participate in the semi-finals. After the rematch, the top athletes took part in the finals.
(2) After the preliminaries of Group A, the athletes in Group A, Group B and Group C (in the final ranking order) have the same scores as those in Group B, so it is necessary to determine two players to participate in the finals. Group a and group c should be eliminated, and group a, group b and group a should play again. After the rematch, the winner and Group A will take part in the final.
(3) After a certain preliminaries, if the athletes in Group A and Group B have the same performance, it is necessary to determine that two athletes will participate in the finals: these four athletes will play a rematch together, and the first two athletes will participate in the finals after the rematch.
3. The rematch shall be held at least one hour (or at the time determined by the parties concerned through consultation) after all the athletes concerned have finished the preliminary swimming. Draw lots to arrange swimming lanes
Extended data
Precautions for swimming
1, swimming is not allowed before and after meals.
Swimming before meals will make you feel weak and prone to collapse. Swimming with a full stomach after a meal is easy to cause vomiting. Anyway, swimming before and after meals will cause physical discomfort, so it is best to go swimming 2 hours after meals.
2. Have a good swim.
For places with deep water, or friends who can't swim well, please remember to bring swimming ring AIDS. If you are tired of swimming, you can rest with them. In case of danger, there are lifesaving tools!
3, swimming time should not be too long
If you soak in water for too long, you will feel very uncomfortable. So the swimming time should not be too long, preferably within 2 hours.
4. Don't swim during menstruation.
For women, the physical resistance during menstruation is poor, and swimming will allow bacteria to enter the body, causing infection. Therefore, female friends should not swim during menstruation.
5. Don't swim in strange waters.
Unfamiliar waters, such as wild reservoirs, lakes and unfamiliar rivers. In unfamiliar waters, you don't know the depth of water, the distribution of underwater stones, weeds and so on. Inadvertently entering the water will increase the probability of drowning accidents.
6. The pressure of water is obviously higher than that of air. Holding your breath and exhaling in water is definitely much more difficult than on land, so beginners should practice the basic essentials of holding your breath and exhaling on land first, and then practice in water. Don't inhale, spit it out at once. You can try to get familiar with holding your breath.
Reference source; Baidu Encyclopedia-Swimming (Sports)