Half a month later, it was the sports day, and the teacher asked me to participate in the shot put,

You can participate, find a physical education teacher to learn the technique, and then practice the shot put speed and explosiveness of the shot, the faster the whole process, the better, this is the embodiment of explosiveness, practice for a week, and then rest for two days and then practice, your results are guaranteed to be not bad. Speed is the core of technical movements, and you must pay attention to the performance of speed when doing movements, so as to maximize your explosive power

1. The action is coherent, in one go, without pause.

2. Actively mobilize the power of lumbar twisting, because this part is the thickest and most core strength position of the whole body.

3. At the moment of shooting, you must concentrate all the strength of your body on your fingertips and "push" the ball out with a handball instead of "throwing" it.

4. Don't, don't foul, control the center of gravity of the body at the end of the pitch, no part of the body can touch the toe board, come out behind the center line of the shot put circle, otherwise you throw 20 meters will be considered invalid.

Key movements: Push your legs fully, twist your waist vigorously, and push the ball quickly with your arms.

Suggestion: During the competition, just warm up until there is a sweat on the head.

What's the use of practicing these? There are two technical movements for pushing the shot put, 1. Sideways sliding 2.

You learn the movements first, don't fix those useless ones, what you do is just strength exercises, dead muscles, it needs a certain amount of explosive power.

Hello student, thank you for your question.

According to my personal training experience, it is not that sports students at this stage do not know how to push the hips, but they cannot correctly make the top hip movements when throwing the shot put with all their might, resulting in the power of kicking the ground cannot be transmitted to the upper limbs through the waist and abdomen.

1. Look for problems.

2. Cause analysis (I don't analyze the problem of your own strength here, because you can't solve it when the exam is approaching.) ）

The fundamental reason is that you have not yet experienced the transmission of power and began to rush to pursue results, which led to your wrong movements and repeated practice to form your current state. This is manifested in the fact that your shot will appear to have a lower torso center of gravity and lower than your pre-swing.

3. Solutions and training methods (don't do the shot put throwing with all your strength for two weeks).

First, feel the conduction of power.

The "whiplash" action occurs in many sports techniques.

Imagine how the whip sounds, the force is at the root of the whip, and the gentle wave of power is transmitted to the tip of the whip. Close your eyes, slowly do the shot put action with your bare hands, feel the transmission process of power from the bottom to the top, and make this action a habit. (About 3 days, practice as many times as you have time every day).

Then, close your eyes and hold a 3 kg, 4 kg, or 5 kg shot put (you don't have to do it if you are a girl) to do a pre-swing action, focusing on the transmission of force and force in the hips, waist and abdomen, and forming muscle memory. (For about a week, once a day in the morning and evening, about 50 times per kilogram group, with an interval of more than 5 minutes between groups.) This phase of training can be lengthened to a total of no more than weeks, because you are running out of time).

Then, hold 4 kg (girls) and 5 kg (boys), do the complete movement, pre-swing once or twice, and complete the complete action of throwing the shot put along the trajectory of the pre-swing action, remembering not to exert 40%-60% strength of the upper limbs. The lower limbs to the waist and abdomen are gradually strengthened, which is reflected in the technical movements, that is, the time to complete the shot is gradually decreasing, and the beginning is the power of the pre-swing, and finally it is a little faster than the swing action, but not the fastest. (About 3 days, 5 groups of 10 reps in the morning and evening, and the medium turning force of each group gradually increases).

Key points: 1. In all training movements, it is not a simple repetition, but the order of exertion.

2. Don't pursue results in all training, results are natural successes.

3. The most important thing, in each of the above three trainings, your shot is to shoot down the sun in the sky, not to throw the shot put, don't ask why, just remember this, and stick to this until the end of the shot put exam, even if the above training is not for you, your performance will be more or less improved.

Finally, I wish you to be admitted to the university of your choice.

The shot put is 4 kg for girls and 5 kg for boys, and if you don't have a technical foundation, use the shot put method on the spot. Don't catch the shot put too hard, hold it with 5 fingers, empty the palm of your hand, and then put it in the right shoulder clavicle fossa, clamp it with your neck, (note that the shot put is pushed out, not thrown out) to complete the pushing, turning, sending, straightening, topping, pushing, dialing coherent exercises, the angle of the shot (38 degrees 42 degrees), not too high, not too low, responsible for the impact of the distance. The focus is on the last force when shooting!

It's also a good idea to exercise with dumbbells, and to have strength when rushing up, the main thing to practice is the explosiveness of the upper limbs! Finally, I wish you more and more physical fitness and better grades!

The weight of the shot put is related to your age and gender, I guess you shouldn't be big, remember that the shot put is pushed not thrown, and no one in the world can throw the shot put. You push the shot put on the spot with your back.,I guess you're choking enough to understand.。。。 Let's put it this way, the shot put is not as simple as you think and see, it uses the force of his whole body to push it from the bottom up.

If you don't have the conditions, tell you the easiest way, push-ups understand, you do some push-ups every day, the amount is distributed by your own ability, you can do the best finger push-ups, don't underestimate the push-ups It can make your whole body practice.

(1) From the experimental data in the table, it can be seen that the elevation angle of the experimental injection with the experimental serial number is equal and the compression length of the spring is different, that is, the velocity of the shot put is different, so the experimental serial number is used to verify Xiaoli's conjecture by experiment; According to the experimental data with the serial number of , it can be seen that when the elevation angle of the injection is the same, the greater the injection velocity, the farther the shot

So the answer is:1; 2；5；When the elevation angle of the shot is the same, the greater the injection velocity, the farther the shot will be thrown (2) From the experimental data in the table, it can be seen that in the experiment with the experimental serial number of , the compression length of the spring is equal, the velocity of the shot put is equal, and when the elevation angle of the shot is 45 °, the distance of the shot put is the largest, so the best elevation angle of the shot put is 45 °

So the answer is: 45°

Xiao Hua participated in the shot put competition When he threw the shot put in his hand, the shot put moved down along the arc after it broke away from his hand, which was due to the action of gravity in the vertical downward direction, which changed the motion of the ball; So the cheering students saw the shot put falling along the arc

In the process of falling, the weight put ball decreases due to the same mass, the height decreases, the gravitational potential energy decreases, the velocity increases, and the kinetic energy increases

So the answer is: heavy; Move; Gravitational potential

1) To ** the relationship between the injection distance and the injection speed, it is necessary to keep the injection elevation angle constant, and only change the injection speed From the data in **, the injection elevation angle of serial number 1, 2, and 5 is 30 °, and the injection speed is different The injection speed of serial number 1 is 5m s, and the distance distance of the injection ridge is yes; The injection velocity of serial number 2 is 10m s, and the injection distance is; The injection velocity of serial number 5 is 15m s, and the injection distance is from which it can be concluded that when the elevation angle of the injection is fixed, the greater the speed of the object thrown, the farther the distance thrown

2) To ** the relationship between the injection distance and the injection elevation angle, it is necessary to keep the injection speed constant, and only change the injection elevation angle From the data in **, the injection speed of serial numbers 2, 3, and 4 is 10m s, and the injection elevation angle is different The injection elevation angle of serial number 2 is 30 °, and the injection distance is; The elevation angle of serial number 3 is 45°, and the shooting distance is; The elevation angle of the 4th is 60°, and the elevation distance is the farthest distance thrown by the object when the elevation angle is 45°

3) Athletes who participate in the shot put throw want to throw farther, they can throw the cherry locust with maximum force in the direction of the 450 elevation angle of the draft.

So the answer is; Shoot out elevation angle; Velocity;

3) Throw with maximum force in the direction of 45 ° elevation

(1) Shot put.

The distance of the throw is related to the height of the point where the shot put is thrown.

2)a.Throw a shot put from a height of h1, record the distance thrown by the shot put, and denote it as s1;

b.Throwing the same shot put from a height of h2 (h1 ≠h2) and throwing it at the same speed and angle is denoted as s2;

c.Compare S1 and S2

3) =s2, the distance at which the shot put is thrown is independent of the height;

s2, the distance at which the shot put is thrown is related to the height of the throw

1) The parabola crosses the point (0,2) and substitutes: y2

k（x-4）2

2=k(0-4)2

k = and y2 passes through the point (x,0), i.e. y2

0 o'clock, there is. Solution: x=10

k= x=10．

2) With moderate force, try your best to push the shot put at an angle of 45° to the horizontal