The myth of lactic acid - it's actually fuel used by muscles

[tnf]

You used to DRINK lactic acid?
Do they make it in drinkable form?

Yeah they do, it's called milk.

That's even better.

[tnf]

you made sure you drank the the levo isomer of it, right kracus?

because that dextral shit won't do a damn thing for you.

[Wizard .3]

A new low haha

[Wizard .3]

That's strange, because in basic metabolism they show how lactic acid is formed and broken down to create energy. Its less efficient than glycolosys, but it still generates energy.

Glycolysis is required before you make lactic acid, because you use th pyruvate produced as the electron acceptor...i think you mean its less efficient than aerobic respiration with oxygen at the end.

Ya, you get less electrons out of anaerobic respiration if I remember correctly (therefore less ATP?), making it much less efficient.

[tnf]

That's strange, because in basic metabolism they show how lactic acid is formed and broken down to create energy. Its less efficient than glycolosys, but it still generates energy.

Glycolysis is required before you make lactic acid, because you use th pyruvate produced as the electron acceptor...i think you mean its less efficient than aerobic respiration with oxygen at the end.

Ya, you get less electrons out of anaerobic respiration if I remember correctly (therefore less ATP?), making it much less efficient.

Yea, the proton gradient established by the ETC produces ATP through the action of ATP synthase....so you get less ATP produced overall that way.

[Fender]

JESUS FUCKING CHRIST KRACUS, YOU DUMB MOTHERFUCKER

Kracus got Juggy to swear!

[R00k]

lol

[Tormentius]

JESUS FUCKING CHRIST KRACUS, YOU DUMB MOTHERFUCKER

Bwahahahahahahaha

[tnf]

But to be honest, lactic acid really isn't 'fuel'....so the title is incorrect too...unless there is a major breakthrough in that article that I haven't read yet.

[mjrpes]

But to be honest, lactic acid really isn't 'fuel'....so the title is incorrect too...unless there is a major breakthrough in that article that I haven't read yet.

umm... from the third paragraph of the article:

Lactic acid is actually a fuel, not a caustic waste product. Muscles make it deliberately, producing it from glucose, and they burn it to obtain energy. The reason trained athletes can perform so hard and so long is because their intense training causes their muscles to adapt so they more readily and efficiently absorb lactic acid.

[[xeno]Julios]

more details:

http://www.berkeley.edu/news/media/rele ... tate.shtml

and the abstract:

http://ajpendo.physiology.org/cgi/conte ... 90/6/E1237

[mjrpes]

These paragraphs seem key:

Experiments with dead frogs in the 1920s seemed to show that lactate build-up eventually causes muscles to stop working. But Brooks in the 1980s and '90s showed that in living, breathing animals, the lactate moves out of muscle cells into the blood and travels to various organs, including the liver, where it is burned with oxygen to make ATP. The heart even prefers lactate as a fuel, Brooks found.

Brooks always suspected, however, that the muscle cell itself could reuse lactate, and in experiments over the past 10 years he found evidence that lactate is burned inside the mitochondria, an interconnected network of tubes, like a plumbing system, that reaches throughout the cell cytoplasm.

[Canis]

But to be honest, lactic acid really isn't 'fuel'....so the title is incorrect too...unless there is a major breakthrough in that article that I haven't read yet.

umm... from the third paragraph of the article:

Lactic acid is actually a fuel, not a caustic waste product. Muscles make it deliberately, producing it from glucose, and they burn it to obtain energy. The reason trained athletes can perform so hard and so long is because their intense training causes their muscles to adapt so they more readily and efficiently absorb lactic acid.

Its a fuel, but derived from a primary source (Glucose) after a bout of anaerobic exercise. The preferred source is glucose, but in anaerobic exercise an alternative chemical reaction is undertaken which results in lactic acid accumulation. The muscles can metabolize this, but arent used to doing so. As such, lactic acid buildup occurs and you're left with aching muscles. Athletes have built up a much more efficient muscle that can metabolize lactic acid for its energy, and therefore build up fewer reserves of the stuff, causing not only a more efficient muscle, but also less negative effects from the lactic acid.

[mjrpes]

Canis, your saying "lactic acid buildup occurs and you're left with aching muscles" goes against what the nytimes article says:

As for the idea that lactic acid causes muscle soreness, Dr. Gladden said, that never made sense.

"Lactic acid will be gone from your muscles within an hour of exercise," he said. "You get sore one to three days later. The time frame is not consistent, and the mechanisms have not been found."

Who is right?

[[xeno]Julios]

as tnf pointed out there is a source of confusion when it comes to muscle soreness - the acute burning sensation which is short term, and the delayed onset muscle soreness which comes a day or 2 after (DOMS).

I think there's speculation that the OH+ ions from the lactic acid somehow react with pain receptors or something - remember reading something vaguely like that on a msgboard a while back.

[Guest]

Men, I so love to see all of you arguing over a subject/topic. Whatever it is, it will always be more constructive to me to see all your points, arguments. I learn a lot from you all. Thanks for all your argumentations and keep on.
I am watching you and learning from you in a way from afar.

[Wizard .3]

Canis, your saying "lactic acid buildup occurs and you're left with aching muscles" goes against what the nytimes article says:

As for the idea that lactic acid causes muscle soreness, Dr. Gladden said, that never made sense.

"Lactic acid will be gone from your muscles within an hour of exercise," he said. "You get sore one to three days later. The time frame is not consistent, and the mechanisms have not been found."

Who is right?

The burning sensation is caused from the lactic acid, and the longterm soreness that occurs the day after is from muscle tear during exercise. I think.
:icon26:

[Maiden]

JESUS FUCKING CHRIST KRACUS, YOU DUMB MOTHERFUCKER

Kracus got Juggy to swear!

now thats fucking funny

[Canis]

Canis, your saying "lactic acid buildup occurs and you're left with aching muscles" goes against what the nytimes article says:

As for the idea that lactic acid causes muscle soreness, Dr. Gladden said, that never made sense.

"Lactic acid will be gone from your muscles within an hour of exercise," he said. "You get sore one to three days later. The time frame is not consistent, and the mechanisms have not been found."

Who is right?

Try clenching and flexing your hands over and over again as fast as you can. Do it until you feel a burn, and keep doing it. It becomes agony after a while...lactic acid buildup among other things is the result. Soreness a few days later isnt lactic acid. I'm talking about in the moment.

[Canis]

Canis, your saying "lactic acid buildup occurs and you're left with aching muscles" goes against what the nytimes article says:

As for the idea that lactic acid causes muscle soreness, Dr. Gladden said, that never made sense.

"Lactic acid will be gone from your muscles within an hour of exercise," he said. "You get sore one to three days later. The time frame is not consistent, and the mechanisms have not been found."

Who is right?

The burning sensation is caused from the lactic acid, and the longterm soreness that occurs the day after is from muscle tear during exercise. I think.
:icon26:

That's correct. Lactic acid is just a metabolite (a product of metabolism and in that sense similar to CO2). These metabolites create an acidic environment that does several things. They act as local vasodialators so more blood reaches the active area, and have several system-wide effects such as hormone release, opioid production, and increased affinity of the blood for O2. Its all part of the response to increased activity/exercise.

[plained]

ey let me get this strait, so they were wrong before ,but theyze right now ey

right on wont be long now b4 everyone look like greek god statue :icon19:

[Guest]

I had MY lactic acids this morning what about you fucking fairies?

[plained]

udderly ridiculous

[Canis]

He's trying to play off his stupidity as a joke.

[prince1000]

how many confirmed kills do you have?

That's none of your buisness

bahahahhahah

*pity post for kracus*