Fast and Slow Twitch Muscle Fibers

Discussion in 'Strength & Conditioning Discussion' started by jea22, Jun 1, 2007.

  1. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    First of all that doesn't answer the athlete question but anyways I found it interesting. I also think this is something to consider.

    "You can be 31/32 black, but if that 32nd ancestor is white you could show up as white, too," she says. "That can be very confusing."

    Having one ancestor who is a different race probabally doesn't change much of your genetic makeup but maybe I'm wrong. Finally this

    "Each person's DNA is unique, but some DNA patterns remain relatively unchanged within families as well as within ethnic and geographical groups. Genetic genealogy tracks those types of DNA."

    It even states in the article that DNA patterns differ between ethnicities and that they remain relatively unchanged in those ethnicities. Why is it farfetched to believe that those different ethnicities might have different physical/mental strengths? Not saying it makes them smarter or better at somethig, but I believe that your ethnicity gives you different natural gifts to mold.

    You just came very close to putting me in my place, but the fact that only 30% trace it to Europeans and that it is more than likely only a handful of European anscestors in that 30% statistic, while thousands of years of African lineage. I'm not saying Africans, Europeans, Asians, whomever are better overall, just that they MIGHT possibly have different mental and physical strengths. Can everyone at least agree with that statement? Good find btw.
     
  2. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    If you read my earlier posts more carefully, I'm saying the exact same thing. Genetics just give certain races an advantage in a certain physical or mental department, but that it does not automatically mean the black will run faster than the white, or the white will outwrestle the black, etc. Just that it gives an advantage. I agree that its what you do with it that deteremines what you become. And that is why I gave a non-genetic reason, because genetics give advantages, but don't do everything for you. Of course someone who never played football won't be good or dominant in it, even if they have the potential. It takes practice and work, genetics just give, or in some cases don't give, advantages.
     
  3. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    Also consider that genetics has been linked to determine how motivated you are.
     
  4. Dan's Knuckles

    Dan's Knuckles Blue Belt

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    Let me drop a bomb on all you S&P powerlifting fanatics; No matter what type of training you do, you will convert your Type IIx (as humans don't have IIa fibers but IIx, animals have IIa) fibers to type IIb. That means no matter what type of training, even if it's all explosive power based, you will lose some of the properties which make the muscle fibers inherently "explosive", however you also improve the speed of contraction of the Type I fibers, and improve the efficiency of the Type IIx and IIb fibers.
    While some people talk about the posibility of changing fiber type from either Type II to Type I and visa versa with LONG term EXTREMELY HARD training in people (it can be done in rats who run on a treadmill all day every day) is by changing which nerve innervates the muscle, which you cannot do through training.
     
  5. Madmick

    Madmick Cerebrage Staff Member Senior Moderator

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  6. Madmick

    Madmick Cerebrage Staff Member Senior Moderator

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    This may not be true.

    There is some research indicating that certain types of maximal eccentric training can convert muscle fiber types.
     
  7. Kozma

    Kozma Banned Banned

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    Blacks from west africa have more fast twitch fiber. This is a fact.
     
  8. Revok

    Revok Brown Belt

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    I heard Jews are good at starting wars.
     
  9. Lee456

    Lee456 Blue Belt

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    No, he isn't. Statements like this do very little to further your argument. If you want people to stick to facts then it's best to take the lead
     
  10. deadlyshaolin

    deadlyshaolin euphoria

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    I heard Americans used to be good at winning them. Who knew?
     
  11. Lusst

    Lusst Red Belt

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    Chad, you are a daft prick.

    I think everyone just needs to shut the fuck up and let Madmick school the ignorant...including myself.
     
  12. Madmick

    Madmick Cerebrage Staff Member Senior Moderator

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    I suppose that's fair. Calling him a racist at this point is merely conjecture. Nevertheless, his argument is farse; it's sociological speculation masquerading as scientific inquiry. His understanding of physiology (or bioenergetics, in this particular matter) is nonexistent.

    So to answer Lusst's call, here's a cut-to-the-bone primer.

    There are three systems by which the body generates energy:
    1) The ATP-CP System (aka the Alactic Anaerobic System)
    2) The Oxygen-Inependent Glycolytic System (aka the Lactic Anaerobic or Anaerobic Glycolytic System)
    3) The Oxygen-Dependent System (aka the Aerobic System)

    Siff even includes a table that shows the percentiles for energy contribution from each of the three energy systems in different sports.

    Swimming
    [50m]
    ATP-CP= 98%
    OIG= 2%
    OD= 0%
    [100m]
    ATP-CP= 80%
    OIG= 15%
    OD= 0%
    [200m]
    ATP-CP= 30%
    OIG= 65%
    OD= 5%
    [400m]
    ATP-CP= 20%
    OIG= 40%
    OD= 40%
    [1500m]
    ATP-CP= 10%
    OIG= 20%
    OD= 70%

    Rugby
    ATP-CP= 90%
    OIG= 10%
    OD= 0%

    Basketball
    ATP-CP= 85%
    OIG= 15%
    OD= 0%


    Hmmm...a 20-second 50m sprint is 98% dependent on the ATP-CP System...kind of throws out this clown's bullshit theory that "West Africans" don't succeed in swimming because they lack slow-twitch muscle fibers, doesn't it?

    And Rugby and Basketball have almost identical energy system demands? Once again, it looks like redneck sociology is the governing philosophy, here.

    Like I said, this is ridiculous. Sociological factors have (and always will) play a much greater role than genetic traits in why certain races succeed at certain sports.

    And Himalaili (or whatever the fuck your name is): before you go off touting yourself a guru, just go reading one fucking book.
     
  13. JPC

    JPC Purple Belt

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    Madmick by brain bar.
     
  14. Q mystic

    Q mystic Silver Belt

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    You are not really 16 are you?
     
  15. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    Turning 17 this September lol, why do you ask?
     
  16. Q mystic

    Q mystic Silver Belt

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    :icon_lol: No shit. You're pretty smart. What are you good at in school and whatnot?
     
  17. Lusst

    Lusst Red Belt

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    I repeat... <3 Madmick
     
  18. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    English by far is my best subject, I had a 104% for a quarter in it lol. So I'm pretty good at papers and reading comprehension. History and Spanish I'm not bad at. I think science is interesting, but I don't really enjoy the math part of chemistry (physics this coming year:icon_neut ) and math is my worst subject. Took the pre-ACT's and their estimating my ACT to be between 31-35. That's basically a summary of my classes. Oh and this year I'll be taking physics, humanities, honors history, pre-calc, and Spanish III.

    P.S.- Thanks lol:redface:
     
  19. You fucker... I thought you were actually Askren.
     
  20. B.A. Ben Askren

    B.A. Ben Askren Yellow Belt

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    If I was him I could make a thread asking you guys to critique my wrestling. LOL. I read that he's going to do MMA after he's done with the 2008 Olympics. He says he wants to give it a try. Anybody think he could destroy, with some training of course, the Welterweight division? I'm gonna start a new topic on the grappling forum relating to the USA Wrestling magazine article btw anybody who wants to check it out.
     

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