References:
Rules of international track and field competition Chapter V Throwing events
18 1 shot put
match
1. Draw lots to decide the order of athletes' trial throwing.
2. If there are more than 8 athletes, each athlete should be allowed to try throwing three times. The top eight athletes with the best effective results can try to throw three times, and the order of trying to throw is opposite to the ranking after the first three attempts. If the eighth place is equal after the third attempt, it will be handled according to the rule 146 3. When there are only 8 people or less in the competition, each person can try throwing 6 times.
3. Before the start of the competition, athletes can practice trial throwing in the competition venue, and the practice should be carried out in the order of drawing lots, always under the supervision of the referee.
4. Once the competition begins, athletes are not allowed to practice with equipment, and they are not allowed to use the throwing ring or the ground in the landing area for trial throwing practice regardless of whether they have equipment or not.
5. The shot put should be pushed from the throwing circle. Athletes must try to throw from a static position. Athletes are allowed to touch the inside of the hoop and toe board.
6. The shot put should be pushed from the shoulder by hand. When the athlete enters the circle and begins to try to throw, the shot put should be close to or close to the neck or jaw, and the ball holder should not be lower than this position during the shot put. Don't put the ball behind the shoulder shaft.
7. (1) It is forbidden to use any device to help throwers, such as tying two or more fingers together with a belt. Do not use bandages or adhesive tapes on your hands except for open wounds that need to be bandaged.
(b) gloves are not allowed.
(c) In order to hold the shot put better, athletes can use some suitable substances, but only by hand.
(d) In order to prevent wrist injury, athletes can put a bandage on their wrists.
(e) To prevent spinal injuries, athletes may wear belts or belts made of other suitable materials.
(f) Athletes are not allowed to spray any substance into the boxing ring or sole.
8. After the athlete enters the circle and starts throwing, if any part of the athlete's body touches the ground outside the circle, or touches the iron ring and toe board, or pushes the shot put in an irregular way, it will be judged as a failed attempt.
9. If there is no violation of the above regulations in the trial throw, the athlete may stop the trial throw that has already started, put the equipment in or out of the circle, leave the throwing circle under the premise of observing this article 12, and then return to the circle to restart the trial throw from the static position.
Note: All actions allowed in this paragraph should be included in the trial throw time limit specified in rule 142 4.
10. The shot put must completely fall within the inner edge of the corner line of the landing area, and the trial throw is effective.
1 1. The score shall be measured immediately after each effective trial throw. Take a straight line from the nearest point of the shot put landing trajectory to the inner edge of the throwing circle, and the measuring line should pass through the center of the throwing circle.
12. Athletes can't leave the throwing circle before the equipment hits the ground. When leaving the throwing ring, the upper edge of the iron ring or the ground outside the ring must be completely behind the white line outside the ring, and the extension line of the rear edge of the white line should be able to pass through the center of the throwing ring.
13. The equipment should be transported back to the throwing circle and cannot be thrown back.
14. The best trial throw performance of each athlete, including the trial throw performance caused by the equal first place in the final ranking competition, is the final result.
Shot put throwing circle
15. Structure: The throwing ring should be made of iron, steel plate or other suitable materials, and its upper edge should be flush with the ground outside the ring. The ground inside the circle should be made of concrete, asphalt or other hard and non-slip materials. The inner surface of the ring should be level, and the movable throwing ring that meets the above requirements can also be used if it is lower than the upper edge of the iron ring14-26 mm.
16. Specification: The inner diameter of the throwing ring should be 2. 135 m (5 mm). The edge of the iron ring should be at least 6 mm thick and painted white.
17. Draw a white line with a width of 5cm and a length of at least 75cm from both sides of the top of the metal ring. This line can be drawn or made of wood or other suitable materials. The extension line of the back edge of the white line should pass through the center of the circle and be perpendicular to the center line of the landing zone.
banket
18. Structure
The toe pad should be made of wood or other suitable materials, painted white, and its shape should be arc, so that its inner edge coincides with the inner edge of the iron ring. Toe board should be installed in the middle position between the two marking lines in the landing area and fixed on the ground.
Note: toe pads previously specified by IAAF can be used.
19. Specification
The width of the toe board is 1 1 and 2-30cm, and the arc length of the inner edge is 1 .22m (1cm), which is higher than the ground in the circle10cm (2mm).
launch
20. Structure
The shot put shall be made of hard iron, copper or other metals with hardness not lower than that of copper, or its shell shall be made of such metals, and the center shall be filled with lead or other metals. The shape of the shot put must be spherical, the surface should not be rough and the joints should be smooth.
2 1. The shot put shall meet the following specifications:
22. In the competition of rule 12 1(a), only the equipment provided by the organizing committee can be used, and no replacement is allowed during the competition. Athletes are not allowed to bring any equipment into the competition venue.
In all other competitions, athletes can use their own equipment, but they should get the approval of the organizing Committee before the competition. All athletes can use their own equipment after passing these inspections and marking them.
Shot put area
23. Use cinder or turf and other suitable materials to lay the site, and the shot put should be able to leave traces when landing.
24. The downward inclination of the landing area in the throwing direction shall not exceed 1: 1000.
25. Mark the landing area with a white line with a width of 5 cm, and the extension line should be able to cast a circle with a central angle of 40 degrees.
Note: The 40-degree fan-shaped landing zone can be accurately set by the following methods: at a distance of 20m from the throwing center, the distance between the angle lines of the two landing zones is 13.68m, that is, the horizontal distance of the angle lines of the landing zone increases by 68.4cm for every increase of 1m from the center.
26. The best performance of each athlete can be marked with eye-catching flags or markers. When placing the mark, it should be placed outside the mark line along the direction of the landing zone.
The current world record can be marked with eye-catching flags or markers, and the latest intercontinental or national records can be marked by electricity on appropriate occasions.
Chapter 182 discus throwing
match
1. Draw lots to decide the order of athletes' trial throwing.
2. If there are more than 8 athletes, each athlete should be allowed to try throwing three times. The top eight athletes with the best effective results can try to throw three times, and the order of trying to throw is opposite to the ranking after the first three attempts. If the eighth place results after the third attempt, it shall be handled according to the rule 146 3. When there are only 8 people or less in the competition, each person can try throwing 6 times.
3. Before the start of the competition, athletes can practice trial throwing in the competition venue, which should be carried out in the order of drawing lots and always under the supervision of the referee.
4. Once the competition begins, athletes are not allowed to practice with equipment, and whether they have equipment or not, they are not allowed to practice trial throwing with throwing rings or the ground in the landing area.
5. discus should be thrown from the throwing circle. Athletes must try to throw from a static position. Athletes are allowed to touch the inside of the hoop.
6. (1) It is not allowed to use any device to help athletes in the trial throw. For example, two or more fingers are tied together with a tape. Do not use bandages or adhesive tapes on your hands unless it is an open injury.
(b) Don't use gloves.
(c) In order to better hold the equipment, athletes can use certain substances, but only by hand.
(d) To prevent spinal injuries, athletes may wear belts made of leather or other suitable materials.
(e) Athletes are not allowed to spray any substance into the boxing ring or sole.
7. After the athlete enters the circle and begins to try throwing, if any part of the athlete's body touches the ground outside the circle or the upper edge of the iron ring, it is a failed try throwing.
8. If the above-mentioned rules are not violated in the trial throw, the athlete may stop the trial throw that has already started, put the equipment in or outside the circle, leave the throwing circle under the premise of observing Article 1 1 of this article, and then return to the circle to start the trial throw from the static position.
Note: All actions allowed in this paragraph should be included in the trial throw time limit specified in rule 142 4.
9. The discus must completely fall within the inner edge of the corner line of the landing zone, and the trial throw is effective.
10. The results shall be measured immediately after each effective trial throw. Take a straight line from the nearest point of the discus landing trace to the inner edge of the iron ring, and the measuring line should pass through the center of the throwing ring.
1 1. Athletes can't leave the throwing ring before the equipment hits the ground. When leaving the throwing ring, the upper edge of the iron ring or the ground outside the ring must be completely behind the white line outside the ring, and the extension line of the rear edge of the white line should be able to pass through the center of the throwing ring.
12. The equipment should be transported back to the throwing circle and cannot be thrown back.
13 The final final result is based on each athlete's best trial throw, including the trial throw result caused by the equal first place in the final ranking competition.
Discus circle
14. Structure
The throwing ring should be made of strip steel, iron or other suitable materials, and the top of the throwing ring should be flush with the ground outside the ring. The ground inside the circle should be made of concrete, asphalt or other hard and non-slip materials. The inner surface of the ring should be flat and lower than the upper edge of the iron ring14-26 mm.
15. Specification
The diameter of the inner edge of the throwing ring shall be 2.50m (5mm). The edge of the iron ring should be at least 6 mm thick and painted white.
16. Draw a white line with a width of 5cm and a length of at least 75cm from both sides of the top of the metal ring. This line can be drawn or made of wood or other suitable materials. The extension line of the back edge of the white line should pass through the center of the throwing circle and be perpendicular to the center line of the area.
Discus throwing
17. Structure
The body of the discus can be solid or hollow, made of wood or other suitable materials, and surrounded by a metal ring with a round edge. The outer edge is horizontal and should be a standard circle with a radius of about 6 mm, and the centers on both sides of the discus can be inlaid with disks flush with the cake body. The metal disk may not be installed, but the corresponding parts should be flat. The size and total weight of discus should meet the requirements.
18. Both sides of the discus must be the same, and there can be no depressions, protrusions or sharp edges. Discus should be inclined in a straight line from the bend on the edge of the metal ring to the edge of the cake center, and the radius of the cake center is 25-28.5 mm
The discus should be smooth, including the whole hoop and nodes, and the discus should be uniform everywhere.
19. In the competition of rule 12 1(a), only the equipment provided by the organizing committee can be used, and no changes are allowed during the competition. Athletes are not allowed to bring any equipment into the competition venue.
In all other competitions, athletes can use their own equipment, but they should get the approval of the organizing Committee before the competition. All athletes can use their own equipment after passing these inspections and marking them.
Tiebingluo area
20. The downward inclination of the landing area in the throwing direction shall not exceed 1: 1000.
When the discus falls, the application of cinder or grass and other suitable materials should leave traces.
2 1. should be marked with a white line with a width of 5cm, and its extension line should be able to pass through the center of the throwing circle with a central angle of 40 degrees.
Note: The following methods can be used to accurately set the 40-degree sector landing zone. At a distance of 20m from the throwing center, the distance between the two landing zone angle lines is 13.68m, that is, for every 1m from the center, the horizontal distance of the landing zone angle lines increases by 68.4cm.
22. You can mark each athlete's best trial throw result with an eye-catching flag or marker. When placing the marker, the marker should be placed outside the angle line along the straight line.
The latest world records can be marked with eye-catching flags or signs, and the latest intercontinental or national records can also be marked on appropriate occasions.
The first 183 discus throwing cage
1. Discus must be thrown out of the net or cage to ensure the audience. Safety of staff and athletes. The cages specified in this clause are applicable to the main sports venues with spectators in the surrounding stands and other activities being held on the venues. This kind of cage can't be used in training ground, and the device with relatively simple structure can meet the needs. Consult the National Athletics Association or the IAAF headquarters, and you will get reasonable advice.
Note: The special cage for hammer throwing in 185 can also be used for discus throwing. Either install a concentric circle with diameters of 2. 135m and 2.50m, or lengthen the protective cage and install a discus throwing ring behind the hammer throwing ring. Details are listed in the rule 185.
2. When designing, manufacturing and maintaining the physical protection of discus, it must be able to prevent discus from running at a speed of 25m/s and a weight of 2kg. This equipment must stop the discus without the danger of popping out of the cage, so that the discus can neither bounce back to the athletes nor fly out from the top of the net. Regardless of the design and structure, any cage that meets all the requirements of this clause can be used.
3. The top view of the cage should be U-shaped, consisting of at least 6 screens with a width of 3. 17m. The width of the opening protected by the Constitution is 6 meters, 5 meters in front of the center of the throwing circle, and the height of the blocking net is at least 4 meters.
The design and structure of the cage should be able to prevent the discus from coming out of the joint of the cage. Rush out of or under the net.
1958- 1978 rules can also be used for discus throwing, but in order to increase safety, the discus circle should be moved back 0.8 meters (that is, the distance from the national center of the throwing circle to the net mouth is 5 meters).
4. The screen can be made of natural materials or synthetic fibers, and can also be made of low-carbon steel wire or high-strength steel wire. The maximum size of steel wire mesh is 5cm, and the maximum size of rope mesh is 4cm. The minimum size of the two nets can be determined according to the cage structure, but the minimum tensile strength should be 40 kg.
In order to protect the continuous safety of the cage, the steel wire should be inspected at least once every 12 months.
It is not enough to check the rope made of fiber only from the appearance. The manufacturer shall weave several sections of standard rope with the same length into a net, and change the next section every 12 months for testing to ensure that the tension of the net meets the requirements.
In the same game, the biggest dangerous sector of throwing discus from the iron cage with the athlete's left hand or right hand is 98 degrees, so the position and direction of the iron cage are extremely important for safe use.
Article 184 Hammer Throwing
match
1. Draw lots to decide the order of athletes' trial throwing.
2. If there are more than 8 athletes, each athlete should be allowed to try throwing three times. The top eight athletes with the best effective results can try to throw three times, and the order of trying to throw is opposite to the ranking after the first three attempts. If the eighth place is equal after the third attempt, it will be handled according to the rule 146 3. When there are only 8 people or less in the competition, each person can try throwing 6 times.
3. Before the start of the competition, athletes can practice trial throwing in the competition venue, which should be carried out in the order of drawing lots and always under the supervision of the referee.
4. Once the competition begins, athletes are not allowed to practice with equipment, and they are not allowed to use the throwing ring or the ground in the landing area for trial throwing practice regardless of whether they have equipment or not.
5. The hammer should be thrown from the throwing circle. Athletes must try to throw from a static position.
In the pre-swing and pre-spin starting positions, players can put the ball on the ground inside or outside the circle.
Athletes are allowed to touch the inside of the throwing circle.
6. An athlete who stops trying to start throwing again should be judged as a failed attempt.
7.(a) It is not allowed to use any devices to help athletes when throwing, such as tying two or more fingers together with a belt. It is allowed to wrap individual fingers with tape, but it should be seen by the referee before the game begins. Do not use bandages or tape on your hands except for open wounds.
(b) gloves are allowed to protect hands. The palms and backs of gloves must be smooth. Fingertips other than the thumb must be exposed.
(c) In order to better hold the equipment, athletes are allowed to use certain substances, but only their hands or gloves.
(d) To prevent spinal injuries, athletes may wear belts or belts made of other suitable materials.
(e) Athletes are not allowed to spray any substance into the boxing ring or sole.
8. If any part of the athlete touches the ground outside the circle or the upper edge of the iron ring after entering the circle, it is judged as a failure in the trial throw.
9. If there is no violation of the above rules in the trial throw, the athlete may stop the trial throw that has already started, put the equipment in or out of the circle, leave the throwing circle on the premise of observing the clause 13 of this article, and then return to the circle to restart the trial throw from the static position.
Note: All actions allowed in this paragraph should be included in the trial throw time limit specified in rule 142 4.
10. If the hammer throw is broken during the trial throw or in the air, as long as the trial throw conforms to the rules, it should not be judged as a failure of the trial throw, nor should it be judged as a failure of the athlete's unbalanced foul.
1 1. The hammer ball should completely fall within the inner edge of the corner line of the landing area, and the trial throw is effective.
12. The results shall be measured immediately after each effective trial throw. Take a straight line from the nearest point of the hammer landing trace to the inner edge of the throwing ring, and the measuring line should pass through the throwing ring concentrically.
13. Athletes can't leave the throwing circle before the equipment hits the ground. When leaving the throwing ring, the upper edge of the iron ring or the ground outside the ring must be completely behind the white line outside the ring. The extension line of the back edge of the white line should be able to pass through the center of the throwing circle.
14. The instrument should be put back into the throwing circle, and it is not allowed to be thrown back.
15. The best trial throw performance of each athlete, including the trial throw performance caused by the equal first place in the final ranking competition, shall be taken as the final result.
Hammer throwing ring
16. Structure
The throwing ring should be made of strip steel, iron or other suitable materials, and its upper edge should be flush with the ground outside the ring. The ground inside the circle can be made of concrete, asphalt or other hard but non-slippery materials. The inner surface of the ring should be flat and lower than the upper edge of the iron ring14-26 mm.
17. Specification
The diameter of the inner edge of the throwing ring should be 2. 135 m (5 mm).
The edge of the iron ring is at least 6mm thick and painted white.
18. Draw a line 5 cm wide from the top of both sides of the throwing circle. A white line at least 75 cm long can be drawn or made of wood or other suitable materials. The extension line of the back edge of the white line should pass through the center of the throwing circle and be perpendicular to the center line of the throwing area.
Hammer can be thrown in the discus circle, but the circle diameter must be reduced from 2.50 meters to 2. 135 meters. You can also put a hammer throw ring in the discus circle.
Hammer throwing
19. Structure
A hammer should be composed of a sphere, a chain and a handle.
20. Hammer ball
The hammer ball shall be made of solid iron or other metals with hardness not lower than copper, or the shell shall be made of such metals, and the center shall be filled with lead or other solid materials. The minimum diameter of the sphere of men's hammer throw is 1 10 mm, and the minimum diameter of the sphere of women's hammer throw is 95 mm The shape of hammer throw should be a complete sphere.
If filler is used, it should not move, and the distance from the center of gravity of the sphere to the center should not be greater than 6 mm
2 1. chain
It should be made of a straight, elastic and unbreakable single steel wire. The diameter of steel wire is not less than 3mm, which is the standard steel wire number. 1 1. When throwing, the chain should not be obviously elongated, and one or both ends of the steel wire can be bent into a ring to facilitate connection.
22. Handling
The handle can be single-ring or double-ring structure, but it must be hard, and there is no jiaozi chain connection. There should be no obvious extension when throwing, and the connection between the handle and the chain must ensure that the total length of the hammer will not increase when the handle rotates in the chain link.
23. Connection between chain and sphere
The connecting chain between the chain and the ball should be connected with the ball through the rotary bearing, which can be a sliding bearing or a ball bearing. The connection of the handle chain should be ring-shaped, and rotating bearings are not allowed.
24. The hammer shall meet the following specifications
Center of gravity of sphere
The distance from the center of gravity of the sphere to the center of the sphere shall not be greater than 6mm. Place the ball without handle and chain on the horizontal circular edge with the diameter of 12mm, and the ball must be balanced.
25. In the competition of rule 12 1(a), only the equipment provided by the Organizing Committee is allowed to be used, and it is not allowed to be replaced during the competition. Athletes are not allowed to bring any equipment into the competition venue.
In all other competitions, athletes can use their own equipment, but before the competition, they should get the approval of the organizing Committee. The equipment provided by the conference can be used by all athletes after inspection and marking.
Drop hammer area
26. The downward inclination of the landing area in the throwing direction shall not exceed 1: 1000.
When the hammer falls to the ground, the application of cinder or grass and other suitable materials should leave traces.
27. Two 5 cm wide white lines should be used to mark the landing area. If the two white lines are extended, they should intersect at the center of the throwing circle at an angle of 40 degrees.
Note: The following methods can be used to accurately set the 40-degree sector landing zone. At the distance of 20 meters from the center of the throwing circle, the distance between the two landing zone marker lines is 13.68 meters, that is, the horizontal distance of the landing zone marker lines increases by 68.4 cm for every increase of 1 meter from the center.
28. You can mark each athlete's best trial throw result with eye-catching flags or markers. When placing the mark, it should be placed outside the mark line along the direction of the landing zone.
The current world record and, if appropriate, the current intercontinental or national record should be marked with eye-catching flags or markers.
Article 185 Hammer Throwing Cage
1. Hammer must be thrown from the net or cage to ensure the safety of spectators, staff and athletes. The protective cage specified in this clause is applicable to major sports with spectators in the surrounding stands and other events being held on the venue. This kind of protective cage is not needed, and equipment with simpler structure can meet the needs. If you consult the National Athletics Association or the IAAF headquarters, you can get reasonable suggestions.
2. When designing, manufacturing and maintaining the hammer cage, it should be able to stop the hammer with a weight of 7.26 kg and a maximum speed of 32 m/s ... This device should not be in danger of rebounding to the athletes or flying from the top of the net when blocking the hammer. All pets of various designs and structures can be used as long as they meet the requirements of this clause.
The top view of the cage should be u-shaped. The cage should be composed of 7 screens, each with a width of 2.74m and a height of at least 7m. The opening width of the cage should be 6 meters, located 42 meters in front of the center of the throwing circle.
The design and structure of the cage should be able to prevent the hammer from rushing out from the joint of the cage, the blocking net or under the blocking net.
4. Two movable screens with a width of 2m and a height of at least 9m should be placed at the front end of the cage, and only one of them can be used at a time.
Note 1: The left movable block is suitable for right-handed throwers and the right movable block is suitable for left-handed throwers. In view of the fact that left-handed and right-handed throwers need to replace both nets in the same game, it is extremely important to replace them with the least manpower in the shortest time.
Note 2: The figure only shows the position of the left moving net and the position of the endpoint of the right moving net when the right-handed thrower uses the cage.
Note 3: During operation, the movable screen must be strictly in the position shown in the figure. Therefore, the movable screen must be designed with a device to fix the movable screen in the rotating position.
Note 4: The structure and operation mode of the movable screen depends on the overall design of the cage, which can be in the form of sliding, hinged with the horizontal axis or vertical axis, or detachable. The only firmness requirement for operating the movable screen is that the screen can completely block the impact of the hammer, and there is no danger of rushing out between the fixed screen and the movable screen.
5. Suitable natural materials or synthetic fibers, low-carbon steel wire or high-strength steel wire can be used to make the screen. The maximum size of steel wire mesh is 50 mm, and the maximum size of rope mesh is 44 mm The minimum size of the two nets should be determined according to the cage structure, but the minimum tensile strength should be 165 kg.
In order to ensure the continuous safety of the cage, the steel wire mesh should be inspected at least once every 12 months. It is not enough to check the rope net made of fibers only from the appearance. The manufacturer shall weave the standard rope with multiple sampling lengths into a net, and change the next section for testing every 12 months to ensure that the tension of the net meets the requirements.
6. If you want to throw discus in the same cage, there are two ways to place the equipment. The simplest method is to install concentric iron rings with diameters of 2. 135 m and 2.50 m, respectively, so that the hammer throw and discus throw use the same ring ground.
Another method is to put the hammer ring and discus ring in the same cage respectively. The two throwing circles must be arranged longitudinally on the central axis of the throwing area. The center of the discus throwing circle is 2.37 meters behind that of the hammer throwing circle. The back of the cage must be enlarged, and at least 8 fixed screens with a width of 2.83m and 2movable screens with a width of 2 m should be used. The minimum height of the fixed net and movable net of the hammer and discus cage should be the same as that of the standard cage.
7. When left-handed and right-handed athletes are in the same game, the maximum dangerous sector thrown out of the cage is about 85 degrees. Therefore, the position and direction of cage are extremely important for safe use.
Article 186 Javelin Throwing
match
1. Draw lots to decide the order of athletes' trial throws.
2. If there are more than 8 athletes, each athlete should be allowed to try throwing three times. The top eight athletes with the best effective results can try to throw three times, and the order of trying to throw is opposite to the ranking after the first three attempts. If the eighth place is equal after the third attempt, it will be handled according to the rule 146 3. When there are only 8 people or less in the competition, each person can try throwing 6 times.
3. Before the start of the competition, athletes can practice trial throwing in the competition venue, which should be carried out in the order of drawing lots and always under the supervision of the referee.
4. Once the competition starts, athletes are not allowed to practice with equipment, nor are they allowed to use the run-up runway or the ground in the landing area for trial throwing, regardless of whether they have equipment or not.
5. (1) Javelin throwing should hold the handle and throw from the shoulder or upper arm of the throwing arm. It is not allowed to throw. Don't throw in an unconventional position.
(b) The trial throw is effective only when the metal tip of the javelin touches the ground before the other parts of the javelin.
(c) During the trial throw, the athlete shall not completely turn his back on the throwing tiger before the javelin is released.
6. (1) It is forbidden to use any device to help athletes in the trial throw, such as tying two or more fingers together with a belt. Bandages are not allowed on hands except for open wounds that need to be bandaged.
(b) Don't use gloves.
(c) In order to better hold the equipment, athletes can use certain substances, but only by hand.
(d) To prevent spinal injuries, athletes may wear belts or belts made of other suitable materials.
7. After the athlete starts the trial throw, any part of his body touches the marking line of the throwing arc approach road and the ground outside the approach road, or the javelin throw does not meet the requirements during the trial throw, which is judged as a failure in the trial throw.
8. If the above provisions are not violated in the trial throw, the athlete can stop the trial throw that has already started, put the equipment in or out of the run-up lane, leave the run-up lane on the premise of meeting the requirements of paragraph 12 of this article, and then return to the run-up lane to start the trial throw again.
Note: All actions allowed in this paragraph should be included in the trial throw time limit specified in rule 142 4.
9. If the javelin is broken during the trial throw or during air flight, it should not be judged as a failure in the trial throw. According to this rule, athletes can try throwing again. If an athlete loses his balance and fouls, he should not be judged as a failure in the trial throw.
10. The javelin tip must completely fall within the inner edge of the corner line of the landing area, and the test throw is effective.
1 1. The score shall be measured immediately after each effective trial throw. Take a straight line from the first contact point of the javelin tip to the inner edge of the throwing arc, and the measuring line should pass through the center of the circle.
12. Athletes can't leave the run-up lane until the javelin hits the ground. When leaving the approach road, the parallel lines or off-line ground on both sides of the approach road must be completely behind the throwing arc and the extension lines at both ends.
13. The equipment must be transported back to the throwing area, not thrown back.
14. The best trial throw of athletes, including the trial throw in the final ranking competition due to the equal results of the first place, shall be taken as the final decision.