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

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  • Published on May 11, 2018
  • 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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    Studies:
    www.sciencedirect.com/science/article/pii/S0022519312002755
    www.ncbi.nlm.nih.gov/pubmed/20147761
    The scientists detailed their findings Monday (Nov. 21) at the annual meeting of the American Physical Society's Division of Fluid Dynamics in Portland, Oregon.

    Sources:
    www.livescience.com/56998-fastest-freestyle-swimming-finger-spread-science.html
    coachrickswimming.com/2014/11/22/open-or-closed-fingers-a-review/


    Thanks for watching!
    Swim fast!
  • Howto & StyleHowto & Style

Comments • 49

  • kray97
    kray97 5 days ago

    Ha...closed fingers here all this time. Will try this on my next visit to the pool.

  • Just some Azian
    Just some Azian 2 months ago

    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

  • twilight
    twilight 4 months ago

    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!!

  • MLG_PANCAKE 310XD
    MLG_PANCAKE 310XD 9 months ago +2

    My fly endurance sucks

    • Nivantic
      Nivantic 3 months ago

      Thats why i just swim 50 :D that's how winning without too much training is easy

    • BlazingBuket
      BlazingBuket 6 months ago

      Same here

  • 광개토대왕
    광개토대왕 Year ago

    01:24 8미리로 벌려서 수영하는게 좋다네요.

  • Sung Jin PARK
    Sung Jin PARK Year ago

    엇! 의식적으로 붙이고 했는데벌려야겠다

  • 정현해
    정현해 Year ago

    살짝 벌리라는건가요?

  • Rock Lee
    Rock Lee Year ago

    ладно, попробую

  • 무키무키만만수

    감사합니다 즐겨보고 배우내요 ^^

  • Pablo Essgalhardo

    And can´t you use finger spacers in competition? Nylon string for example.

  • Richard Patronik
    Richard Patronik Year ago

    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.

    • Skills NT Swimming
      Skills NT Swimming  Year ago +1

      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.

  • Fa M
    Fa M Year ago

    Good info

  • Mya Baker
    Mya Baker Year ago +2

    I’m excited to try this in practice

  • Eliana Andrade
    Eliana Andrade Year ago +1

    Thank you! I learned that I should swim with closed fingers too but I will try your tip! Your videos are amazing!!! Congrats!!!

  • Sang Trần Tiến

    at high speed, your turbulence doesn't help at all

  • Sang Trần Tiến

    Just watch athletes like Phelps, what they do is correct, thats all

    • Pedro Gomes
      Pedro Gomes 2 months ago

      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 ;)

  • Dieudonnee Mahn
    Dieudonnee Mahn Year ago

    Ooo, he THICC

  • William Baldwin
    William Baldwin Year ago

    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.

  • MaximumBGGT
    MaximumBGGT Year ago +6

    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.

  • Pritam Mishra
    Pritam Mishra Year ago

    Awesome series"!!!!

  • Igor Litvin
    Igor Litvin Year ago

    Easy to check. Go to water and start to move your palm in water. The best palm position is with higher resistance.

  • Night Night
    Night Night Year ago

    Could you complete the Navy Seal drown proofing? I bet you could but i would like to hear your opinion on it.

  • Lee李이Sang相상 Hwa和화

    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/

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    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!

    • m.s cho
      m.s cho Year ago

      감사합니다 ^^

    • Lee李이Sang相상 Hwa和화
      Lee李이Sang相상 Hwa和화 Year ago +1

      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!

  • Maggie G
    Maggie G Year ago

    do you have an app or something with the swimming sessions and progression tracking ?

  • Nick Butler
    Nick Butler Year ago

    Do you ever swim with flippers just for fun?

  • Saman
    Saman Year ago +4

    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!

  • polymath
    polymath Year ago +1

    Also it's important to slightly bend at the wrists - this will fire up the lats as opposed to shoulders.

  • 배호짱
    배호짱 Year ago +1

    wow!

  • Justin Daubney
    Justin Daubney Year ago +17

    These people know there stuff BRILLIANT

  • Antonio Sotelo
    Antonio Sotelo Year ago +5

    Los sigo en su canal en español y en ingles, good job ❤
    No se olviden de su gente latina y traduzcan los videos 💔😫

  • Oscar Almiron
    Oscar Almiron Year ago +1

    Subtítulos? T.T

  • Marta Fernández
    Marta Fernández Year ago +3

    Hola este último vídeo no está traducido

  • Rangel Oliveira
    Rangel Oliveira Year ago

    nice video!

  • Mattia Farronato
    Mattia Farronato Year ago +17

    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.

    • Skills NT Swimming
      Skills NT Swimming  Year ago

      That makes sense, since the fingers are relaxed when gliding. Maybe too relaxed 🤔 thanks!