High Jump Technique Points

An athlete uses physics to shatter world records Asaf BarYosef

In the early 1960s, Dick Fosbury tried his hand at almost every sport, but never excelled at anything, until, at the age of 16, he turned to the high jump. But when he couldn't compete against the strong athletes at his college using the standard high jump techniques of the time, Fosbury tried to jump a different way: backwards.

Instead of jumping with his face towards the bar, bringing each leg over in the traditional straddle method, he jumped with his back towards the bar. Fosbury improved his record by over half a foot, and left his coaches amazed by this strange new style of high jumping. During the next few years,

Fosbury perfected his high jump style, won the U.S. National trials, and assured his place in the 1968 Olympics in Mexico. In the Olympic Games, Fosbury amazed the world with his new technique, winning a gold metal with an Olympic record leap of 2.24 meters. By the next Olympic Games, almost all of the competing of high jumpers

had adopted what came to be known as the Fosbury Flop. What's the secret behind the techniqueé It lies in a physics concept called the center of mass. For every object, we can locate the average position of all of its mass by taking into account how the mass

is spread around the object. For instance, the center of mass of a flat, rectangular object of uniform density will be in the intersection of both diagonals, in equal distance from each corner. We can find the center of mass for other objects by similar calculations, or by finding the object's balancing point,

which lies right underneath its center of mass. Try balancing a broom by holding it and slowly bringing your hands together until they meet. This balancing point lies right underneath the broom's center of mass. We humans also have a center of mass. When most people stand up, their center of mass is around the belly,

How to Jump Higher for Volleyball Fast Way to Improve Vertical Jump How to Spike a Volleyball

Today we are just going to talk about verticaljump height and how to improve that number. It's a test that a lot of people get testedon when they go play their sports or go into combines and things like that. We are goingto work on how to improve that height. So I am going to bring in Morgan real quick.Morgan is going to give us a demonstration of a vertical jump. Ah, it's basically a squatjump but just picture that she is testing on a vertical jump and then we'll talk abouttraining progressions and how we are going to go ahead and work on improving that. SoMorgan, just stand tall. When you are ready just squat and get up into the air. Alrightgood. So, it looks pretty simple. She is squatting,

she is jumping up in the air. But we are goingto break this down and we are going to work on improving it. We are going to break itdown into 3 different segments. First we are going to talk about her ability to load properlyor decelerate. She is going to start tall. Too many times athletes have a hard time withthis jump because they can't load their body properly. So usually it is a posture thingor they don't have the mechanics to go ahead and load properly. So we are going to watchMorgan go ahead and just load into a solid base. Load, good. So out of this positiona lot of times what athletes have a hard time doing is that knees will cave in. So, kneescave in and I lose glut activation. I will

lose force, I will lose energy when I go aheadto jump. Go ahead and turn to the side real quick Morgan. This is a good upper body. Sostart tall and go ahead and load. A lot of times athletes will have this sort of roundedback so I am leaking a lot of energy once again into that low back. That will resultin poor performance when I go ahead to jump. One of the biggest things we see too is whenthey load, they will go ahead and load her anterior. Meaning they jump with all theirweight going forward and their heels will be off the ground. So she is going to load,her heels are off the ground. We can see lack of stability here obviously. She is goingto have a hard time getting up in the air

because she is unstable. Also, she is loadingthe knee. Go ahead and drop back down for me. She is loading the knees a lot; not backhere to the hips. This is her powerhouse. All her power comes from right here but sheis loading through there. So once again, not a good source of power production or forceproduction. We want to go load through there. So real quick: Morgan, once again start tall.She is going to load into a nice solid stable base. So now she is ready, she is loaded throughthe hips and she is ready to get up in the air. Go ahead and relax Morgan. So a lot oftimes, we see athletes have a hard time loading properly and they have already lost heightand power from their jump. Just from simply

how they are loading improperly. OK, so nowwe have gotten that down and Morgan is able to load properly. So go ahead and load properly.She is down and she is ready to jump. So once she has this down, now we are going to workon her ability to reaccelerate up. So she is loaded, she is stable, she is ready toproduce force, now go ahead and jump up into the air. Because of that stable position,because of that good posture and good kinetic chain of alignment throughout her body thatwe are looking at here, she is able to get up into the air quickly, aggressively andwith power. Righté Because that is what we need her to do. Once she is stable, then getup quick. Go ahead and do another one real

quick Morgan. As she reaccelerates, it isour chance now to basically work on her hip extension and triple extension through thebody but primarily here. Her jumping production comes from here once again. So it is flexedand then go ahead and reach, jump up in the air extended, that is where that power comefrom. And that is going to add inches onto that vertical height. So we worked on herability to go ahead and load her hips. We worked on her ability to reaccelerate andget up into the air quickly, and bring her hips through. But now we have to put it alltogether, righté Because when she does her vertical jump on her test, she starts tall,she loads and gets up into the air. So go

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