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Anonymous
The most recent occurrence of burning in my muscles while working out which I can recall was in middle school.

Now, I know that the reason for the burn is lactic acid, and that this lactic acid provides a rich fuel for muscles; that said, it is not a good thing that I do not feel that burn. Any theories on why this does not happen any more? I still work out very hard. Should I increase reps and decrease weight? I usually do 6 rep/3-4 sets of almost as much weight as I can handle.
>> Anonymous
Do squats
>> Anonymous
Lactic acid build up is really more of an endurance exercise thing.
>> Anonymous
You get no burn/soreness because you've been doing the same regimen for EVAR. Modify it slightly (like, instead of doing bench presses, do incline bench presses) and you'll get your burn back.
>> Anonymous
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>lactic acid provides a rich fuel for muscles

What?

Where are you getting your sources from? If they said that, then they have no idea what they're talking about.

Lactic Acid is a by-product of anaerobic respiration... meaning, you feel the burn when your muscles run out of oxygen.

Just because you don't feel the burn doesn't mean that your muscles aren't getting a good workout... but yes, in general burn = good.

Also... MUSCLE CONFUSION! LOOK IT UP!
>> Anonymous
>>39284
no, he's right. the soreness is caused by hydrogen ion something something. lactic acid is fuel.

from brianmac.co.uk:

"The lactic acid system is capable of releasing energy to resynthesise ATP without the involvement of oxygen and is called anaerobic glycolysis. Glycolysis (breakdown of carbohydrates) results in the formation of pyruvic acid and hydrogen ions (H+). A build up of H+ will make the muscle cells acidic and interfere with their operation so carrier molecules, called nicotinamide adenine dinucleotide (NAD+), remove the H+. The NAD+ is reduced to NADH that deposit the H+ at the electron transport gate (ETC) in the mitrochondria to be combined with oxygen to form water (H2O)."

" Lactate, which is produced by the body all day long, is resynthesized by the liver (Cori Cycle) to form glucose that provides you with more energy. Sounds like a friend to me."

the whole lactic acid bad thing is an old discounted myth.
>> Anonymous
feeling soreness just means you've done a particular type of training. if you're doing low rep heavy work you won't get much muscular soreness.
>> Anonymous
>>39308

Jesus Christ.

I feel like going /b/ on your ass but I'll restrain myself.

There's a BIG difference between Lactate and Lactic Acid.

I mean really if your going to copy and paste something at least try and understand what it's saying. WHAT YOU POSTED ACTUALLY BACKS UP WHAT I SAID.

glucose ----broken down to via a series of steps to----> lactic acid + energy (ATP)

This is anaerobic respiration.... meaning WITHOUT OXYGEN.

LACTIC ACID the waste product, BURNS!


Seriously... what grade are you in? This is basic bio.
>> Hammerknife !7ITukp3Pj2
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>>39308

Idiot, idiot, idiot, idiot, idiot.

Anaerobic respiration produces acid byproducts, which are later broken down through the electron transport chain when oxygen is reintroduced - a process which takes time, since it's regulated by your breathing.

If you haven't finished high school you don't belong on /fit/.
>> Anonymous
>>39308
>lactic acid is fuel.

You are an imbecile and completely wrong. We get taught this sort of thing when we're 12-13 in my country.
>> Anonymous
>>39342
>>There's a BIG difference between Lactate and Lactic Acid.

meh, depends. the terms are used interchangebly by convention.

>>LACTIC ACID the waste product, BURNS!

yeah, not quite. it's the h+ ions caused by glcolysis that makes the muscles acidic and interfers with cell function. causing fatigue.

lactic acid is actually the mechanism by which the body continues to produce energy in anerobic states, by removing the inhibiting h+ ions.

there will come a point where the body can't remove lactic acid fast enough for everything to be happy. but what this actually means is that the body cannot remove the h+ ions fast enough, as lactic acid is the mechanism by which this happens un anerobic conditions. so once again, it's all about the hydrogen.
>> Anonymous
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>>39370

Well it turns out that nobody in this thread is fully right or fully wrong:

From wiki:

"During power-intensive exercises such as sprinting, when the rate of demand for energy is high, lactate is produced faster than the ability of the tissues to remove it and lactate concentration begins to rise. This is a beneficial process since the regeneration of NAD+ ensures that energy production is maintained and exercise can continue. The increased lactate produced can be removed in a number of ways including

* oxidation to pyruvate by well-oxygenated muscle cells which is then directly used to fuel the citric acid cycle and
* conversion to glucose via the Cori cycle in the liver through the process of gluconeogenesis.

Contrary to popular belief, this increased concentration of lactate does not directly cause acidosis, nor is it responsible for delayed onset muscle soreness.[1] This is because lactate itself is not capable of releasing a proton, and secondly, the acidic form of lactate, lactic acid, cannot be formed under normal circumstances in human tissues. Analysis of the glycolytic pathway in humans indicates that there are not enough hydrogen ions present in the glycolytic intermediates to produce lactic or any other acid."
>> Anonymous
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>>39456

continued:

"The acidosis that is associated with increases in lactate concentration during heavy exercise arises from a separate reaction. When ATP is hydrolysed, a hydrogen ion is released. ATP-derived hydrogen ions are primarily responsible for the decrease in pH. During intense exercise, aerobic metabolism cannot produce ATP quickly enough to supply the demands of the muscle. As a result, anaerobic metabolism becomes the dominant energy producing pathway as it can form ATP at high rates. Due to the large amounts of ATP being produced and hydrolysed in a short period of time, the buffering systems of the tissues are overcome, causing pH to fall and creating a state of acidosis. This may be one factor, among many, that contributes to the acute muscular discomfort experienced shortly after intense exercise."
>> Anonymous
>>39462
It's like Dio, but gay.

Alright, gayER.