Competition rules of various swimming styles
(1) freestyle
1. Any swimming style 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. Athletes should face the starting end, grab the handshakers at both ends, and keep their feet (including toes) underwater. It is forbidden to trample in or on the sink, or hook the edge of the sink with your toes.
2. After starting and turning around, the athlete should push off 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 athlete reaches the finish line, he must touch the wall in supine position.
Note: "except turning over" should be understood as "you can only change your supine position in the process of continuous turning over"
(3) breaststroke
1. From the first arm movement, after each turn, the body is prone and the shoulders are parallel to the water.
2. All movements of arms and legs should be carried out at the same time and on the same water surface, and there can be no alternating movements.
3. Put your hands out of your chest at the same time on the water, underwater or above the water, and paddle backwards on the water or underwater. 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. In the process of kicking, your feet must be everted, and it is not allowed to cut clips, kick water alternately up and down, and kick water downward in dolphin style. As long as you don't do the downward dolphin kick, you are allowed to put your feet out of the water.
5. Every time you turn around and reach the finish line, your hands should touch the wall at the same time, and your 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 part of the athlete's head should be exposed to 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. The body must always be prone except when turning. 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 movements of both feet must be carried out at the same time, and both legs and feet are allowed to do the action of drawing water up and down on the vertical plane at the same time. Legs or feet may not be on the same horizontal plane, but they are not allowed to move alternately.
4. Every time you turn around and reach the finish line, your hands should touch the wall at the same time, and your first two shoulders should be parallel to the water surface.
5. At the start and after each turn, athletes are allowed to do one or more strokes and one underwater stroke, which must make their bodies 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.