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Rules to play High Jump
Rules to play High Jump
1. High jump
The high jump historically called the broad jump is a track and field event in which athletes combine speed, strength, and agility in an attempt to leap as far as possible from a take off point. This event has a history in the Ancient Olympic Games and has been a modern Olympic event for men since the first Olympics in 1896 and for women since 1948.
2. Technique
There are five main components of the high jump the approach run, the last two strides, takeoff, action in the air, and landing. Speed in the run up, or approach, and a high leap off the board are the fundamentals of success. Because speed is such an important factor of the approach, it is not surprising that many high jumpers also compete successfully in sprints. A classic example of this high jump sprint doubling are performances by Carl Lewis.
3. The approach
The objective of the approach is to gradually accelerate to a maximum controlled speed at takeoff. The most important factor for the distance traveled by an object is its velocity at takeoff both the speed and angle. Elite jumpers usually leave the ground at an angle of twenty degrees or less; therefore, it is more beneficial for a jumper to focus on the speed component of the jump. The greater the speed at takeoff, the higher the trajectory of the center of mass will be. The importance of a takeoff speed is a factor in the success of sprinters in this event.

The length of the approach is usually consistent distance for an athlete. Approaches can vary between 12 and 19 strides on the novice and intermediate levels, while at the elite level they are closer to between 20 and 22 strides. The exact distance and number of strides in an approach depends on the jumpers experience, sprinting technique, and conditioning level. Consistency in the approach is important as it is the competitors objective to get as close to the front of the takeoff board as possible without crossing the line with any part of the foot. Inconsistent approaches are a common problem in the event. As a result the approach is usually practiced by athletes about 6 8 times per jumping session see Training below.

4. The last two strides
The objective of the last two strides is to prepare the body for takeoff while conserving as much speed as possible. The penultimate stride is higher than the last stride. The competitor begins to lower his or her center of gravity to prepare the body for the vertical impulse. The final stride is shorter because the body is beginning to raise the center of gravity in preparation for takeoff. The last two strides are extremely important because they determine the velocity with which the competitor will enter the jump; the greater the velocity, the better the jump.
5. Takeoff
The objective of the takeoff is to create a vertical impulse through the athletes center of gravity while maintaining balance and control. This phase is one of the most technical parts of the high jump. Jumpers must be conscious to place the foot flat on the ground, because jumping off either the heels or the toes negatively affects the jump. Taking off from the board heel first has a braking effect, which decreases velocity and strains the joints. Jumping off the toes decreases stability, putting the leg at risk of buckling or collapsing from underneath the jumper. While concentrating on foot placement, the athlete must also work to maintain proper body position, keeping the torso upright and moving the hips forward and up to achieve the maximum distance from board contact to foot release. There are four main styles of takeoff the kick style, double arm style, sprint takeoff, and the power sprint or bounding takeoff.

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