The technical elements of the back to back high jump

The main feature of the back-to-back high jump run-up is the arc run-up, and the run-up line is generally "j", and its advantages are:

1 The preparatory section of the run-up is a straight line or a line with a small curvature, so it is easy to accelerate and exert speed throughout the run.

2 The transition to the arc is gentle and natural, avoiding pauses or slowdowns.

3. The curvature of the arc changes from large to small, so that the body gradually increases the internal frequency.

4. The last step is about 20 degrees to 30 degrees angle with the crossbar to ensure that the human body has a suitable vertical displacement distance relative to the crossbar after taking off. The task of the run-up is to achieve the necessary horizontal speed and create the conditions for an improved take-off and a smooth crossing of the crossbar. The back-to-back high jump generally uses 8 to 12 steps to run, which is divided into straight and arc runs.

1. Straight-line running technique: similar to the short-circuit mid-course running technique, the center of gravity of the body is high and stable, the upper body is appropriately leaned forward, the back pedal is full and powerful, the front swing is actively lifted, and the arms are coordinated and swing largely;

2 Arc running technique: The body is gradually leaned inward, increasing the swing amplitude of the outer leg arm, and keeping the head and torso in a straight line to lean inward. The whole process of running should have obvious acceleration and a strong sense of rhythm, especially the last few steps gradually accelerated, to the last step is the fastest.

High jump back style teaching skills, running and take-off techniques.

I think the more the back is, the better the athlete can play; The back-crossing type is more in line with the ergonomic structure, so that the athlete's body can be used more reasonably, so as to use the state of inertia free fall, which can make the athlete better exert all his strength, so it is more suitable for athletes.

Because this way you can jump higher, you can overcome your fear, this is higher than leapfrogging, you can better use inertia to get excellent results, it is very safe, and you can avoid accidents.

Because being over-the-top high jump allows athletes to show their strength; The back-to-back high jump conforms to the anatomy of the human body, using eccentricity and the natural inertia of the human body to allow athletes to perform better.

The essentials of back-to-back high jump technique.

a) Run-up.

1.Run-up missions.

As you can see from the back-to-back jump, you should run in a straight line in the early part of the run, and you should get as much horizontal speed as possible. The arc run at the end of the run-up should create as much centrifugal acceleration as possible for the run and jump, helping to move in the direction of the crossbar.

2.Technical points of the run-up.

Start running in a straight line, with your shoulders drooping and your forefeet on the ground, so that you can run elastically; Raise the center of gravity, even stride, and keep accelerating; When running in an arc, the outside swing leg kicks the ground elastically. To overcome the effect of centrifugal acceleration, the upper body should be slightly inclined to the inside of the arc. The forefoot lands in an arc, and the body's center of gravity crosses the footstep line inward.

The rhythm of the run-up should be fast, especially the hip joint forward delivery in the last two steps of the run-up should be large, the upper body should maintain a more vertical posture when stepping, swing back actively, fully push back, and the jumping leg should be stretched forward quickly, and the hip should be sent forward naturally. During the run-up, the arms should swing back and forth actively and vigorously, and the swing amplitude of the outer arm should be greater than that of the inner arm when running in an arc.

2) Jump. The purpose of the take-off is to quickly transform the horizontal speed gained by the run-up into a vertical upward movement, so that the body can fully lift up and prepare for the pole crossing. The take-off action can be divided into three stages: landing of the take-off leg, cushioning and pushing, and the coordination of the swinging leg and the arms.

1.Landing techniques, cushioning and stretching of jumping legs.

To speed up the take-off, the take-off leg should land on the outside of the ball of the foot sharply and steadily, and quickly roll from the heel to the ball of the foot. At this time, due to the active and rapid forward delivery of the hip joint and the rapid arc running when stepping and lowering the foot, the body is tilted backwards and inwards is formed. In the buffering phase of take-off, in order to increase the speed of take-off.

The amplitude of knee flexion should also be reduced to facilitate the maintenance of horizontal velocity. At this stage, when the body changes from tilting to perpendicular to the center of gravity of the body to the top of the take-off leg, quickly and forcefully straighten the three joints of the take-off leg fully, and the torso stands almost vertically on the take-off leg in an instant before leaving the ground. At this time, the direction of the kick-off leg should be on the outside of the body's center of gravity, so as to generate the necessary rotational momentum to cross the bar.

2.Coordination technique between swinging legs and arms during take-off.

When jumping, the arm farther away from the crossbar swings the neck upward, and the arm is not fully swinged, and the brake is early, which is conducive to the shoulder axis inclined to the crossbar. The swing leg swing should start next to the jump leg with the knee bent, lead with the knee, bend the knee first, fold the knee, and swing out vigorously above the distal pillar of the back jump. When the swing leg is in front of the take-off leg, it should be turned inward, and the calf and foot should be slightly abducted.

The back-to-back high jump is the conversion of the forward speed of the run-up into an upward speed. Professional athletes rarely rely on jumping ability to gain upward speed, but rather on run-up speed. If they all jump poles on jumping ability, then all NBA players can participate in high jump.

They can really jump over a 2-meter pole by jumping, but the Olympics are around. And a little more, like Stephen.

A high jumper like Holm is 183 centimeters tall, but he can't even touch an NBA basket.

But he can jump over the 240 bar with a run-up, which is the case at the Athens Olympics.

of champions. Having said all that, I just want to say that high jump is the conversion of lateral speed to ascent speed, so people will be pressed by their feet first in the process of conversion, so that the upper body will bend involuntarily because of inertia, so that it will lose a lot of strength, and the back style of the back will not bend, so it will naturally not lose strength, and will get more lifting force, so it will naturally jump very high. <>

The back-to-back high jump is a new high jump technology that emerged and developed at the end of the 60s of the 20th century. Due to its ability to give full play to the potential of an athlete's speed and explosiveness.

It has replaced other traditional high jump methods as the most advanced high jump technology in modern times. The complete technique of the back-to-back high jump consists of four parts: run-up, take-off, pole crossing and cushion dropping.

Most back-to-back high jumpers use an 8-step method. The first four steps are straight-line runs, and the angle between the running direction and the crossbar is 70-90 degrees. <>

The last four steps are the arc run, which transitions from facing the bar to facing the bar during the jump. Straight line running requirements: When stepping on the first sign line, the rear gaze should be active and flexible, the action will gradually increase the amplitude, and the upper body will maintain the feeling of "lifting up", and the center of gravity of the body will fluctuate smallly.

Passing the ball is an important part of the jump that ultimately determines the success or failure of the jump. A reasonable rod crossing technique should use the rotation of the human body to control the change of rotation speed according to the change of the relative position of the human body and the crossbar, so that all parts of the body can pass the crossbar smoothly.

The characteristic is that it is very rhythmic when running, the sense of rhythm is very strong, it has its own beat, and there will be a fixed pace such as a ruler when running, and it will enter the slag and run according to the frequency of their breathing.