Mechanical analysis of the back to back high jump jumping action 15

The essentials and tips are as follows:

1. When running in high jump, it is generally 6 to 8 steps, and the angle of the run-up is related to the posture of the pole, between 25° and 90°. When running, it is necessary to accelerate evenly while the center of gravity of the body moves smoothly forward, and it is necessary to run easily and naturally. The last 3 to 4 steps of the run-up should be run with a lower center of gravity.

The movement structure should be different from that of ordinary running: the upper body leans forward smallly, the arms move largely, and the heel hits the ground first and quickly rolls to the forefoot landing.

2. When the high jump is carried out to the second step of the jump, the direction should be correct, so that the body can fully rise and move forward. When the last step of the run is supported by the swinging leg, you should actively do the kneeling knee and hip sending movement, step on the jumping leg with the thigh and calf, hook the toe to send the hip forward and stretch, and quickly roll on the heel first until the whole foot touches the ground. Due to the effect of fast running, stepping on the ground and swinging legs and swinging arms, the jumping legs are forced to bend the knees to cushion the action.

3. Straight-line running technology. Its form is similar to the short-circuit running technique, the athlete's body must have a high and stable center of gravity during the run-up, which drives the upper body to lean forward appropriately, the heel push must be very strong, the speed of the forward swing leg lift must be accelerated, and the left and right arms must be coordinated with the whole body swing large-scale.

4. Arc running technology. The body must be leaned inward during the arc run, and the outer leg and arm should increase the swing amplitude when necessary, and try to keep your head, body, and torso tilted inward in a straight line.

5. Pole crossing and landing skills, after jumping into the air, make full use of the height. When the lower leg of the swing leg crosses the crossbar, the swing leg and the arm on the same side are extended forward and rotated inward, the shoulders are buckled inward, and the head is rotated to make the body into a prone position on the bar. Then, the swinging leg and ipsilateral arm continue to extend and rotate forward, and the head dives, while the jumping foot bends the knee and retracts it, quickly twisting the pelvis and flipping the jumping leg so that the body turns around the crossbar.

After crossing the bar, land on both arms and swinging legs at the same time.

The back-to-back high jump technique is the most advanced, but its technical maneuvers are also the most complex. It takes at least a year to practice the back passing, and only if someone guides you. According to the center of gravity model, the center of gravity is estimated to be about 40 cm above the crossbar using a leapfrog crossbar. Use a prone crossbar, with the center of gravity about 10 15 cm above the crossbar; The center of gravity is about 0 5 cm below the crossbar.

From the above comparison, it can be seen that under the same jumping ability, the center of gravity of the jump is the highest relative to the crossbar, and the high jump score is also the worst; The center of gravity is the lowest relative to the crossbar, and the high jump is the best.

We can see some actual data that an athlete with a height of meters stands upright with the center of gravity of the body in meters above the ground and the maximum jump height in meters. When he jumps vertically upwards, the height of the center of gravity of his body is meters. When he crossed the pole in different positions, his high jump results were as follows:

The leap jump score is around the meter; The score of the prone high jump is about the meter; The back-to-back high jump score is around the meter.

<> with a back-over crossbar, the human body has a higher position on the buttocks and abdomen, a lower position on the head and limbs, and a lower center of gravity than the crossbar. The person is bow-shaped, with the center of gravity outside the human body, below the crossbar. Therefore, the high jump with the back jump is better than the height of the jump with other methods.

Because when a person's back crosses the pole, the person's body is bent. At this time, the center of gravity is not in the upper part of the body, but below the waist. In this case, the center of gravity is still below the pole, but the upper part of the person's body passes above the pole, so it jumps higher.

It is still a matter of the center of gravity, and the height of the center of gravity to be raised in the back crossing type is less than that of the jumping type. The earth has a gravitational pull, so the height of the center of gravity is the human body overcoming the gravitational pull of the earth.

The work done. The lower the center of gravity, the work done to overcome gravity.

The smaller, which is why the back jump is the most reasonable high jump technique!

Because this posture is actually the highest posture that can be jumped, it is the most reasonable. This is the result of the training of the athletes.

In the back-crossing pose, when the person crosses the crossbar, the buttocks and abdomen are higher, and the head and limbs are lower, often lower than the crossbar, and the person is arch-shaped, and the center of gravity is outside the human body, below the crossbar. Therefore, the high jump score can be better than the normal vertical jump height of the human body's center of gravity.

Because this high jump method is particularly safe, it is better for athletes. So that's the most reasonable.

Because the strength of the waist allows us to be a little higher, we can show the strength of the other, so on the field, we use the waist up a little bit to pick a higher one.

There are ways to run, to do supine silver crunches, to do prone braws, to do planks and skipping rope. These methods can improve our leg strength, and they can also improve the bouncing power of our sharpeners, and if we can do these things well, we will definitely be able to jump higher.

Improve your bouncing ability and jump ability, so that you can improve your leg explosiveness, you can make your training reach the peak of a missing round, and you can improve your strength and luck.

It refers to the practice of training the pedaling and swinging, helping the relevant horizontal speed of the running and grasping, paying attention to the series of explosive power of the take-off jump, paying attention to the strength of the bending leg swing, and practicing the speed of the pedal.