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Swimming with open or closed fingers? physics of swimming part 3 

Skills N' Talents
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On this video we will discuss how the hands pull water and we will find out what is the best position of the fingers.
On the first part we discussed how we float and on the second part what makes us move and what stops us. Knowing that, we know that the hands and the feet are the main sources of propulsion. What if I told you that according to studies we could increase by 8% de drag coefficient on every stroke. That translates in dropping a little more than half a second on a 50 free, simply by changing the position of your fingers.
Intuitively, we think that having our fingers close to each other would help us pull more water but that is not correct. The reason for this is that there is a boundary layer on each finger that resists movement. If the fingers are close to each other around 4 to 8 mm apart, this creates some turbulence that helps pull more water. Essentially, this layer can help increase your hand’s area of drag.
The magic number according to some studies is 8 mm of spread. Your thumb should also be close to your hand. Naturally your fingers are separated almost like that when the hand is relaxed. So it is not biomechanically challenging, in theory. This is new information for me, but it looks like my body intuitively found this to be the best way to pull water, although sometimes my thumb goes out too much and my fingers spread too wide while gliding. But I think it is possible if it is practiced enough. It has been shown that swimmers can adjust the angle of their dive by only 1 degree, so why not a few millimeters of finger spreading?
speaking about the dive, if you want to know what a perfect dive looks like according to physics make sure to subscribe and wait for the next chapter of this series.
And if you want to swim faster click here to Check out our 10 workout swordfish program!
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16 сен 2024

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Комментарии : 55   
@MaximumBGGT
@MaximumBGGT 6 лет назад
When I was young, we were always taught to swim with our fingers together. However, I think most swimmers can intuitively feel the greater pull that they get with slightly spread fingers. Great video.
@mattiafarronato9484
@mattiafarronato9484 6 лет назад
The tendency of the fingers to spread (particularly the thumb in your case) is due to the sheer force applied by the water, to put it simply: the (small amount) of water passing between your fingers exerts some pressure on the side of the fingers, and it tends to increase with increasing pull strenght. So a mild effort should be put in place to keep the fingers in the right position.
@SkillsNT
@SkillsNT 6 лет назад
That makes sense, since the fingers are relaxed when gliding. Maybe too relaxed 🤔 thanks!
@justindaubney5361
@justindaubney5361 6 лет назад
These people know there stuff BRILLIANT
@phoeNYkx
@phoeNYkx 6 лет назад
Also it's important to slightly bend at the wrists - this will fire up the lats as opposed to shoulders.
@elianaandrade1089
@elianaandrade1089 6 лет назад
Thank you! I learned that I should swim with closed fingers too but I will try your tip! Your videos are amazing!!! Congrats!!!
@antoniosotelo9648
@antoniosotelo9648 6 лет назад
Los sigo en su canal en español y en ingles, good job ❤ No se olviden de su gente latina y traduzcan los videos 💔😫
@SkillsNT
@SkillsNT 6 лет назад
En eso estoy! gracias por seguirnos
@SkillsNT
@SkillsNT 6 лет назад
Listo!
@antoniosotelo9648
@antoniosotelo9648 6 лет назад
graciaasss
@kray97
@kray97 4 года назад
Ha...closed fingers here all this time. Will try this on my next visit to the pool.
@chrisjarvis955
@chrisjarvis955 5 месяцев назад
i have known this for a long time but when trying to tell someone about it they did not agree so was looking it up. you think MythBusters' would have done this one.
@mya8121
@mya8121 6 лет назад
I’m excited to try this in practice
@SharonPiano8
@SharonPiano8 2 года назад
I found that forcing my fingers closed together made my hands feel numb after a workout. I am glad it is okay to relax the fingers and even swim faster that way.
@saman6135
@saman6135 6 лет назад
hello sir, can you make a video based on diving! Diving isn't a big deal for me but after diving when I apply dolfin I trend to be panic and loose control!
@braydenw2786
@braydenw2786 3 года назад
You mean dive or start?
@igorlitvin3018
@igorlitvin3018 6 лет назад
Easy to check. Go to water and start to move your palm in water. The best palm position is with higher resistance.
@leesanghwa8175
@leesanghwa8175 6 лет назад
헤엄칠 때 손가락을 붙여야 할까요 아니면 벌려야 할까요? 수영의 물리학 3부 Swimming with open or closed fingers? physics of swimming part 3 이번 영상에서 우리는 손이 어떻게 물을 당기는지에 대하여 말씀드리고 가장 좋은 손가락 자세는 무엇인지 알아보겠습니다. 1 부에서는 어떻게 뜨는지를, 2 부에서는 무엇이 우리를 움직이고 무엇이 멈추게 하는지를 말씀드렸습니다. 그래서 이제 우리는 양손과 두 발이 추진력의 주요 원천임을 알게 되었습니다. 만약 제가 연구 결과에 따르면 팔을 매번 당길 때마다 저항 계수를 8%까지 늘릴 수 있다고 말씀드리면 어떨까요. 그에 따르면 단순히 손가락 자세를 바꾸는 것 만으로 50 미터 자유형 기록을 0.5 초 가량 단축할 수 있다는 뜻이 됩니다. 우리는 직감적으로 손가락을 서로 붙여야 더 많은 물을 당기는 데 좋다고 생각합니다 하지만 그 생각은 맞지 않습니다. 그 이유는 움직임에 저항하는 경계 구역이 각 손가락 주변에 생기기 때문입니다. 만약 손가락들 사이 간격이 대략 4에서 8 mm 정도 된다면, 손가락 사이에 와류(渦流)가 발생하면서 더 많은 물을 당길 수 있게 됩니다. 본질적으로 이 경계 구역은 손의 저항 면적을 키우게 됩니다. 어떤 연구들에 따르면 8 mm 간격으로 벌리는 것이 가장 좋다고 합니다. 엄지 또한 검지에 가까워야 합니다. 손에 힘을 때면 손가락들은 자연적으로 거의 그렇게 벌어집니다. 그러므로 이론적으로는, 인체역학적인 측면에서 그렇게 어렵지 않습니다. 이것은 저도 몰랐던 정보입니다, 그렇지만 제 몸은 이것이 물을 당기는 최선의 방법임을 직관적으로 알아낸 것 같습니다, 비록 가끔은 엄지가 너무 벌어지고 활강하는 동안 손가락 간격이 너무 넓게 벌어지긴 하지만. 그렇지만 충분히 연습한다면 그것이 가능하다고 생각합니다. 수영인들이 뛰어드는 각도를 1 도까지도 조정할 수 있음이 알려져 왔습니다, 그러니 손가락을 몇 mm 벌리는 것이 안 될리는 없겠지요? 뛰어드는 것에 대한 말이 나왔으니, 만약 물리학에 따른 완벽한 뛰어들기가 어떤 모습인지 알고 싶다면, 반드시 구독하고 이 시리즈의 다음 편을 기다려주세요. 더 빠르게 헤엄치고 싶다면 여기를 눌러 우리의 스워드피시(swordfish, 황새치) 10 개 훈련 세트 프로그램을 확인해보세요! 스워드피시(swordfish, 황새치) 프로그램 skillswimming.com/swordfish/ Skills NT 가게: skillswimming.com/swimming-shop/ email 목록을 구독해주세요: bit.ly/SubscribeSkillsNT 우리가 좋아하는 아마존 제품들: bit.ly/SkillsNAmazon 우리의 페이트리언이 되어주세요: www.patreon.com/user?u=4140610 인스타그램: instagram.com/skillsntalents 페이스북: facebook.com/SkillsNTalents 연구 논문들: www.sciencedirect.com/science/article/pii/S0022519312002755 www.ncbi.nlm.nih.gov/pubmed/20147761 2016년 11월 21일 목요일 오레건주 포틀랜드에서 열린 미국 물리학회 유체 역학 분과의 연례 모임에서 과학자들은 자세한 연구 결과를 발표했습니다. 출처: www.livescience.com/56998-fastest-freestyle-swimming-finger-spread-science.html coachrickswimming.com/2014/11/22/open-or-closed-fingers-a-review/ 시청해주셔서 감사합니다! 빠르게 헤엄치세요!
@leesanghwa8175
@leesanghwa8175 6 лет назад
1 00:00:11,883 --> 00:00:13,388 Physics of Swimming Part 3 수영의 물리학 3부 2 00:00:13,467 --> 00:00:16,287 Welcome to the 3rd part of physics of swimming. 수영의 물리학 3부 시청을 환영합니다. 3 00:00:16,327 --> 00:00:19,770 On this video we will discuss how the hands pull water 이번 영상에서 우리는 손이 어떻게 물을 당기는지에 대하여 말씀드리고 4 00:00:19,795 --> 00:00:23,094 and we will find out what is the best position of the fingers. 가장 좋은 손가락 자세는 무엇인지 알아보겠습니다. 5 00:00:23,182 --> 00:00:26,610 On the first part we discussed how we float, 1 부에서는 어떻게 뜨는지를, 6 00:00:26,703 --> 00:00:31,031 and on the second part what makes us move and what stops us. 2 부에서는 무엇이 우리를 움직이고 무엇이 멈추게 하는지를 말씀드렸습니다. 7 00:00:31,142 --> 00:00:36,479 Knowing that, we know that the hands and the feet are the main sources of propulsion. 그래서 이제 우리는 양손과 두 발이 추진력의 주요 원천임을 알게 되었습니다. 8 00:00:36,559 --> 00:00:44,586 What if I told you that according to studies we could increase by 8% the drag coefficient on every stroke. 만약 제가 연구 결과에 따르면 팔을 매번 당길 때마다 저항 계수를 8%까지 늘릴 수 있다고 말씀드리면 어떨까요. 9 00:00:44,688 --> 00:00:53,011 That translates in dropping a little more than half a second on a 50 free, simply by changing the position of your fingers. 그에 따르면 단순히 손가락 자세를 바꾸는 것 만으로 50 미터 자유형 기록을 0.5 초 가량 단축할 수 있다는 뜻이 됩니다. 10 00:00:53,095 --> 00:01:00,978 Intuitively, we think that having our fingers close to each other would help us pull more water but that is not correct. 우리는 직감적으로 손가락을 서로 붙여야 더 많은 물을 당기는 데 좋다고 생각합니다 하지만 그 생각은 맞지 않습니다. 11 00:01:01,149 --> 00:01:07,234 The reason for this is that there is a boundary layer on each finger that resists movement. 그 이유는 움직임에 저항하는 경계 구역이 각 손가락 주변에 생기기 때문입니다. 12 00:01:07,320 --> 00:01:12,531 If the fingers are close to each other around 4 to 8 mm apart, 만약 손가락들 사이 간격이 대략 4에서 8 mm 정도 된다면, 13 00:01:12,591 --> 00:01:16,535 this creates some turbulence that helps pull more water. 손가락 사이에 와류(渦流)가 발생하면서 더 많은 물을 당길 수 있게 됩니다. 14 00:01:16,560 --> 00:01:21,123 Essentially, this layer can help increase your hand’s area of drag. 본질적으로 이 경계 구역은 손의 저항 면적을 키우게 됩니다. 15 00:01:21,234 --> 00:01:26,119 The magic number according to some studies is 8 mm of spread. 어떤 연구들에 따르면 8 mm 간격으로 벌리는 것이 가장 좋다고 합니다. 16 00:01:26,230 --> 00:01:29,830 Your thumb should also be close to your hand. 엄지 또한 검지에 가까워야 합니다. 17 00:01:29,926 --> 00:01:35,521 Naturally your fingers are separated almost like that when the hand is relaxed. 손에 힘을 때면 손가락들은 자연적으로 거의 그렇게 벌어집니다. 18 00:01:35,546 --> 00:01:40,026 So it is not biomechanically challenging, in theory. 그러므로 이론적으로는, 인체역학적인 측면에서 그렇게 어렵지 않습니다. 19 00:01:40,170 --> 00:01:42,691 This is new information for me, 이것은 저도 몰랐던 정보입니다, 20 00:01:42,735 --> 00:01:47,816 but it looks like my body intuitively found this to be the best way to pull water, 그렇지만 제 몸은 이것이 물을 당기는 최선의 방법임을 직관적으로 알아낸 것 같습니다, 21 00:01:47,873 --> 00:01:52,237 although sometimes my thumb goes out too much 비록 가끔은 엄지가 너무 벌어지고 22 00:01:52,336 --> 00:01:56,158 and my fingers spread too wide while gliding. 활강하는 동안 손가락 간격이 너무 넓게 벌어지긴 하지만. 23 00:01:56,343 --> 00:02:00,350 But I think it is possible if it is practiced enough. 그렇지만 충분히 연습한다면 그것이 가능하다고 생각합니다. 24 00:02:00,382 --> 00:02:05,453 It has been shown that swimmers can adjust the angle of their dive by only 1 degree, 수영인들이 뛰어드는 각도를 1 도까지도 조정할 수 있음이 알려져 왔습니다, 25 00:02:05,478 --> 00:02:09,880 so why not a few millimeters of finger spreading? 그러니 손가락을 몇 mm 벌리는 것이 안 될리는 없겠지요? 26 00:02:09,905 --> 00:02:11,246 Speaking about the dive, 뛰어드는 것에 대한 말이 나왔으니, 27 00:02:11,286 --> 00:02:15,385 if you want to know what a perfect dive looks like according to physics 만약 물리학에 따른 완벽한 뛰어들기가 어떤 모습인지 알고 싶다면, 28 00:02:15,410 --> 00:02:19,226 make sure to subscribe and wait for the next chapter of this series. 반드시 구독하고 이 시리즈의 다음 편을 기다려주세요. 29 00:02:19,345 --> 00:02:20,855 And if you want to swim faster 더 빠르게 헤엄치고 싶다면 30 00:02:20,910 --> 00:02:25,016 click here to Check out our 10 workout swordfish program! 여기를 눌러 우리의 스워드피시(swordfish, 황새치) 10 개 훈련 세트 프로그램을 확인해보세요! 31 00:02:25,230 --> 00:02:26,246 Thanks for watching! 시청해주셔서 감사합니다! 32 00:02:26,317 --> 00:02:27,650 Swim fast! 빠르게 헤엄치세요!
@lovely_misook
@lovely_misook 5 лет назад
감사합니다 ^^
@pritammishra6933
@pritammishra6933 6 лет назад
Awesome series"!!!!
@NickMaovich
@NickMaovich 3 года назад
Swim fast!
@maggsta3132
@maggsta3132 6 лет назад
do you have an app or something with the swimming sessions and progression tracking ?
@williambaldwin9346
@williambaldwin9346 6 лет назад
I am not primarily interested in swimming faster, but of course, it is not a bad thing to achieve. My main goal is weight loss, get my beer gut down and flatten my abs. I am about 300 pounds now, down from almost 345 a few years ago. My weight goal is 270, would love to get there before 2019.
@jkxss
@jkxss 2 года назад
How is it coming along?
@nightnight762
@nightnight762 6 лет назад
Could you complete the Navy Seal drown proofing? I bet you could but i would like to hear your opinion on it.
@배호짱
@배호짱 6 лет назад
wow!
@무키무키만만수-y2n
@무키무키만만수-y2n 6 лет назад
감사합니다 즐겨보고 배우내요 ^^
@pabloessgalhardo5317
@pabloessgalhardo5317 6 лет назад
And can´t you use finger spacers in competition? Nylon string for example.
@fajarmangadan2476
@fajarmangadan2476 6 лет назад
Good info
@TimothyTakemoto
@TimothyTakemoto Год назад
Can you sprain your fingers though by doing this?
@cinderella364
@cinderella364 5 лет назад
My swim coach is constantly saying I need to close all my fingers while swimming. I know he is a such bad coach without having passion how to help swimmer well!!
@kickstartenglishofc
@kickstartenglishofc 6 лет назад
nice video!
@SkillsNT
@SkillsNT 6 лет назад
Thanks!
@zhao4113
@zhao4113 5 лет назад
My coach tells me to keep my fingers closed and in my head im like bruh that just means i wont pull a lot of water
@martafernandez9568
@martafernandez9568 6 лет назад
Hola este último vídeo no está traducido
@SkillsNT
@SkillsNT 6 лет назад
Se me olvidó traducirlo 😅 ya los pongo en un par de horas
@SkillsNT
@SkillsNT 6 лет назад
Listo!
@عمررضا-ل7ذ
@عمررضا-ل7ذ 2 года назад
للأسف لا توجد ترجمة باللغة العربية
@artimity
@artimity 6 лет назад
ладно, попробую
@nickbutler9831
@nickbutler9831 6 лет назад
Do you ever swim with flippers just for fun?
@정현해-e7e
@정현해-e7e 6 лет назад
살짝 벌리라는건가요?
@paegunho1
@paegunho1 6 лет назад
01:24 8미리로 벌려서 수영하는게 좋다네요.
@sangtrantien9103
@sangtrantien9103 6 лет назад
Just watch athletes like Phelps, what they do is correct, thats all
@pedrogomes2399
@pedrogomes2399 5 лет назад
Not always... Plus, what athletes do is not always "watchable" to the naked eye as often it has more to do with the way they transfer energy trhough their body ;)
@oscaralmiron2241
@oscaralmiron2241 6 лет назад
Subtítulos? T.T
@SkillsNT
@SkillsNT 6 лет назад
Se me olvidaron los subtítulos! En unas horas los pongo. Sorry
@SkillsNT
@SkillsNT 6 лет назад
Listo!
@lil_siamese714
@lil_siamese714 5 лет назад
My fly endurance sucks
@sandwichdepescado6442
@sandwichdepescado6442 5 лет назад
Same here
@GarryKasparov12
@GarryKasparov12 5 лет назад
Thats why i just swim 50 :D that's how winning without too much training is easy
@sangtrantien9103
@sangtrantien9103 6 лет назад
at high speed, your turbulence doesn't help at all
@richardpatronik7358
@richardpatronik7358 6 лет назад
You do not “pull water”. Read Doc Councilman’s (coach of the University of Indiana) doctoral thesis on Bernoulli’s Principles as Applied to Human Propulsion in Water. It was written in the 1970’s. Moving or pulling water is not what you want to do. The goal is to find still water and propel yourself over a fixed point. This is a physics concept. So simple. A basketball player jumps off of a solid platform, not a moving base. A swimmer does not want to move water, but, rather, find still water against which they can push. Do your homework or go home. You do not understand the basic concept of physics, so stop pretending you know your subject.
@SkillsNT
@SkillsNT 6 лет назад
That is just a way of seeing things on what the movement of the arms of the swimmer does, it has nothing to do with physics or the video. In the past 50 years we have new ways of referring to the stroke, this is based on more current research. You can see the references on the description of the video.
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