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Lactic acid not the cause of muscle fatigue?

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Old 18-02.-2008, 03:20 AM   #1
fleshbroiler
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Default Lactic acid not the cause of muscle fatigue?

Am curious if anyone else saw this article. Lactic acid buildup doesn't cause muscle fatigue anymore? When did this happen?

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Old 18-02.-2008, 04:11 AM   #2
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Default Re: Lactic acid not the cause of muscle fatigue?

Quote:
Originally Posted by fleshbroiler
Am curious if anyone else saw this article. Lactic acid buildup doesn't cause muscle fatigue anymore? When did this happen?


A few million years ago. However, it's probably been known by man for quite sometime, perhaps decades.
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Old 18-02.-2008, 04:56 AM   #3
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Default Re: Lactic acid not the cause of muscle fatigue?

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A few million years ago. However, it's probably been known by man for quite sometime, perhaps decades.
And now women know it too.
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Old 18-02.-2008, 05:26 AM   #4
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by fleshbroiler
Am curious if anyone else saw this article. Lactic acid buildup doesn't cause muscle fatigue anymore? When did this happen?
Yep, lactic acid(really blood lactate) isn't the bad guy. It's not really news but people are so entrenched in the lactic acid soreness myth they don't want to hear it. Try googling "lactic acid soreness" and see how many hits you get debunking that firmly held belief.
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Old 18-02.-2008, 07:24 AM   #5
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Default Re: Lactic acid not the cause of muscle fatigue?

Looks like anti-doping agencies will have another class of drug to put on their list.
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Old 18-02.-2008, 09:24 AM   #6
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Default Re: Lactic acid not the cause of muscle fatigue?

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And now women know it too.

When did THAT happen??
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Old 18-02.-2008, 09:45 AM   #7
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Default Re: Lactic acid not the cause of muscle fatigue?

So what causes the pain?

Ischaemia? Tissue oedema and stretch of pain fibres? Local pH alteration and pain fibre stimulation? Others?
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Old 18-02.-2008, 12:29 PM   #8
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Default Re: Lactic acid not the cause of muscle fatigue?

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So what causes the pain?


What difference does it make? It's not like there's anything you can do about it.
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Old 18-02.-2008, 02:55 PM   #9
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by beerco
What difference does it make? It's not like there's anything you can do about it.

Once upon a time there was nothing one could do about those chest pains of heart attacks, and people just died. Then science changed everything.
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Old 18-02.-2008, 03:06 PM   #10
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by sogood
Once upon a time there was nothing one could do about those chest pains of heart attacks, and people just died. Then science changed everything.


My bad, I didn't realize you were personally a scientist working on some of that "science" stuff to eliminate muscle pain
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Old 18-02.-2008, 04:17 PM   #11
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Default Re: Lactic acid not the cause of muscle fatigue?

Yeah, I saw that article in the times earlier this week. My issue is that it doesn't really say anything of revelant importance. It tells us that muscle damage is caused by calcium leaks with the muscular tissue, but it doesn't reveal any sort of information that would change the way people train.

What am i supposed to start bringing Tums along on rides to aid recovery?
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Old 18-02.-2008, 04:23 PM   #12
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Default Re: Lactic acid not the cause of muscle fatigue?

Not sure about muscle damage, but my reading of it was that those leaky Ca channels was partly the explanation for muscle fatigue. Muscle fatigue could be reduced by reducing the "leakiness" of those ion channels, by 10-20%.
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Old 18-02.-2008, 04:36 PM   #13
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by no1kung1
but it doesn't reveal any sort of information that would change the way people train.
I've read about lactic acid not being the cause of muscular fatigue a few years back, but that didn't change my training a bit. If I understand it correctly, we're not even supposed to change how we train based on that knowledge.

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Old 18-02.-2008, 10:10 PM   #14
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by sogood
Not sure about muscle damage, but my reading of it was that those leaky Ca channels was partly the explanation for muscle fatigue. Muscle fatigue could be reduced by reducing the "leakiness" of those ion channels, by 10-20%.
Yes, but there probably is a reason why the body sends you pain signals when it does. If you tamper with it for the sake of 10-20% improvement, there is no saying what side-effects will happen - is it worth the risk of causing quasi-permanent damage somewhere in your body?
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Old 19-02.-2008, 08:25 AM   #15
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Default Re: Lactic acid not the cause of muscle fatigue?

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Originally Posted by TheDarkLord
Yes, but there probably is a reason why the body sends you pain signals when it does. If you tamper with it for the sake of 10-20% improvement, there is no saying what side-effects will happen - is it worth the risk of causing quasi-permanent damage somewhere in your body?

That depends on what was the source of stimulation of those pain fibres. You see, that argument only partly make sense as we all know that we train to push beyond our lactic/pain threshold in order to perform better. If we always use pain as the limit of our training and activities, then we are not likely to get stronger and better.
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