An athlete uses physics to shatter world records - Asaf Bar-Yosef
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Date: 2020-08-22
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Comments and reviews: 10
TheThirdMan
Speaking as a qualified sports science teacher and former high jump coach for about ten years, I can say that this is simply wrong. First lets clear the air of a few assumptions made by this video.
1) Fosburys technique is revolutionary because of centre of gravity advantages not found in other techniques and
2) That the performance increases were due to those advantages.
The centre of gravity issue is massively overstated here. Anyone who saw a competent dive straddle jumper like Valeri Brunel or Vladimir Yashchenko (the last straddler to hold the world record) could not help but notice that, in terms of bar clearance, the advantage of a well executed flop jump is marginal. The difference is not what happens in the air but what happens on the ground.
This is where the differences lie. A straddle jumper normally uses a slower run up but has a deeper gather in the final stride, giving a longer foot contact time. The swinging free leg generates a lot of momentum and at the time the jumper leaves the ground, the jumpers foot will probably be above the level of their head. This requires exceptional hip and thigh flexibility but places the CoG well above that for a flop takeoff.
The flop approach is completely different. It is a sprint approach with a short foot contact time, the jumper increasing the height of their CoG with vigorous arm swings. Some use both arms. Others, like Fosbury himself, use only a single arm.
Once the jumper leaves the ground, the path of the CoG is determined and nothing can be done to change it.
On to the second point. There are several advantages to the flop technique. The main one is that it is easier to learn and new jumpers will achieve results more quickly than with other techniques. The second advantage is that it does not require the extreme levels of flexibility that the straddle does. Taken together, the straddle has a more efficient takeoff but the flop has a more efficient bar clearance.
I am also of the opinion that, with new pits and bars, flop jumpers are probably less likely to suffer injuries than straddle jumpers.
Most important of all is understanding that the actual jumping part is the most important bit. I dont care which technique you use. If you dont get off the ground, you wont clear big heights. At least 90% of the work is done on the ground.
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Speaking as a qualified sports science teacher and former high jump coach for about ten years, I can say that this is simply wrong. First lets clear the air of a few assumptions made by this video.
1) Fosburys technique is revolutionary because of centre of gravity advantages not found in other techniques and
2) That the performance increases were due to those advantages.
The centre of gravity issue is massively overstated here. Anyone who saw a competent dive straddle jumper like Valeri Brunel or Vladimir Yashchenko (the last straddler to hold the world record) could not help but notice that, in terms of bar clearance, the advantage of a well executed flop jump is marginal. The difference is not what happens in the air but what happens on the ground.
This is where the differences lie. A straddle jumper normally uses a slower run up but has a deeper gather in the final stride, giving a longer foot contact time. The swinging free leg generates a lot of momentum and at the time the jumper leaves the ground, the jumpers foot will probably be above the level of their head. This requires exceptional hip and thigh flexibility but places the CoG well above that for a flop takeoff.
The flop approach is completely different. It is a sprint approach with a short foot contact time, the jumper increasing the height of their CoG with vigorous arm swings. Some use both arms. Others, like Fosbury himself, use only a single arm.
Once the jumper leaves the ground, the path of the CoG is determined and nothing can be done to change it.
On to the second point. There are several advantages to the flop technique. The main one is that it is easier to learn and new jumpers will achieve results more quickly than with other techniques. The second advantage is that it does not require the extreme levels of flexibility that the straddle does. Taken together, the straddle has a more efficient takeoff but the flop has a more efficient bar clearance.
I am also of the opinion that, with new pits and bars, flop jumpers are probably less likely to suffer injuries than straddle jumpers.
Most important of all is understanding that the actual jumping part is the most important bit. I dont care which technique you use. If you dont get off the ground, you wont clear big heights. At least 90% of the work is done on the ground.
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Tino
The world record was set two years prior by a jumper named Brunel? using the straddle technique, an inch higher than Fosburys flop. Brunel suffered a career ending injury prior to the Olympics. The physics actually show that with a well executed straddle dive technique the hyped physics of the flop can be recreated. some believe that the current high jump record will not be broken until the straddle makes a return.
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The world record was set two years prior by a jumper named Brunel? using the straddle technique, an inch higher than Fosburys flop. Brunel suffered a career ending injury prior to the Olympics. The physics actually show that with a well executed straddle dive technique the hyped physics of the flop can be recreated. some believe that the current high jump record will not be broken until the straddle makes a return.
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Just
I remember my father claiming that the high jump had become one of just brute strength and no technique because he didn't understand that the flop is actually the exact opposite of brute strength. He was a reasonable man, but quite a bit older than me, and by the time I had figured out basically what is shown in these graphics, he was long gone. Too bad, he would have enjoyed learning this.
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I remember my father claiming that the high jump had become one of just brute strength and no technique because he didn't understand that the flop is actually the exact opposite of brute strength. He was a reasonable man, but quite a bit older than me, and by the time I had figured out basically what is shown in these graphics, he was long gone. Too bad, he would have enjoyed learning this.
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Anthony
PEPs. Performance Enhancing Physics. That sounds like something that should be banned. UCI banned Obree's egg position. That was a PEP. Then Obree came up with the superman, UCI banned that too. The IOC did not ban the flop. To this day the egg position is the best for the reduction of the x-sectional area; in CdA factor. Lol. Big up the IOC. LOL.
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PEPs. Performance Enhancing Physics. That sounds like something that should be banned. UCI banned Obree's egg position. That was a PEP. Then Obree came up with the superman, UCI banned that too. The IOC did not ban the flop. To this day the egg position is the best for the reduction of the x-sectional area; in CdA factor. Lol. Big up the IOC. LOL.
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Rob
Not quite right and the animation is way way way way way way exaggerated. Very few high jumper get the centre of mass below the bar and only by as much as 2 cm if you examine the literature. biomechanics in sport Chapter 14 high jump
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Not quite right and the animation is way way way way way way exaggerated. Very few high jumper get the centre of mass below the bar and only by as much as 2 cm if you examine the literature. biomechanics in sport Chapter 14 high jump
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Wakaziar
This is a very silly title. Everything that uses kinetic motion (so all sports and human function) uses physics. It would make more sense to say how they achieve because right now Im utilising physics to breathe
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This is a very silly title. Everything that uses kinetic motion (so all sports and human function) uses physics. It would make more sense to say how they achieve because right now Im utilising physics to breathe
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Meme
I have my own high jump technique too. I went to do a scissor kick from the right but brought my left leg up first. This made me do a spin through the air and get over the 115cm bar even though I was 130cm tall.
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I have my own high jump technique too. I went to do a scissor kick from the right but brought my left leg up first. This made me do a spin through the air and get over the 115cm bar even though I was 130cm tall.
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Arafat
If he failed that day, then this technique never introduce to sport. xD
By the way, that was a great technique to jump much higher and now every high jumper use 'Fosbury flop'.
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If he failed that day, then this technique never introduce to sport. xD
By the way, that was a great technique to jump much higher and now every high jumper use 'Fosbury flop'.
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Yash
How funny is the fact that he had to actually jump lower than others to win at high jump competitions( w. r. t his c. o. m. )
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How funny is the fact that he had to actually jump lower than others to win at high jump competitions( w. r. t his c. o. m. )
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Axle
imagine if michael jordon approached the bar like he flew in to dunk, only he turned over in midair and cleared it by a foot.
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imagine if michael jordon approached the bar like he flew in to dunk, only he turned over in midair and cleared it by a foot.
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