Muskelförlust vid överträning

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Ok gav mig på sökfunktionen men hittade inget bra svar.

Men iallafall överträning har man ju råkat ut för ett antal gånger men frågan är hur reagerar musklerna, efter att ha blivigt nerbrutna byggs de upp starkare igen som vanligt fast det tar längre tid att återhämta sig. Eller förlorar man helt enkelt muskelmassa?

sommarlov, regn, och sjuk den ultimata kombinationen.

[King Grub]

En bra artikel, fast på engelska:

After the onset of high-intensity training exercise the body pumps out cortisol which breaks down protein into their constituent amino acids and routes them to the liver for conversion to glucose.

The longer the workout, the more cortisol is pumped in and the more protein is destroyed.

This causes a "catabolic state" as the largest supply of protein lies in the muscles so that is where the cortisol goes first.

Research by Costill and Nieman et al., has shown that one hour of intense strength training will increase the protein stores in our immune and skeletal systems, but that any further training will only begin to deplete these stores.

Overtraining can force the body into a weakened physical state, which, at best can produce a cold or the flu and, at worst, can tear muscles ligaments, and tendons once these body parts lose their structural integrity protein loss.

The culprit is a built-in "survival" drug hormone called cortisol. Immediately following a high intensity effort, the body pumps out this hormone whose function is simple: It carries off the proteins to the liver, where they are converted into glucose, for energy use in the body.

Why does this weaken our defense mechanisms? Because all our immune systems are based on proteins, and the influx of control in our biological mix steals the proteins that make up our immune system.

Nieman, a researcher at Loma Linda University found that athletes who train twice as intensely as normally prescribed will wind up with twice as many colds, and viruses.

Nieman investigated the athletes for cortisol. He found that astonishingly, after only ONE grueling strength training session, their bodies revealed a 60% increase in cortisol production.

Among the first proteins to go were the T-cells that make up our front line of defense against viruses. This watchdog system was depleted by more than 30 percent. However, this shortfall lasted only 6-8 hrs.

So you're probably thinking "What's the big deal? Is putting your body at risk for only 6-8 hours such a high price to pay?"

Well, Nieman and other researchers found that after a few days of such exercising, the "at risk" time became longer and longer, until the T-cells stopped rejuvenation.

In addition, the body's first line of defense against bacteria and viruses an antibody known as IgA, which is found in the saliva, was reduced to nearly non-protective levels.

The conclusion of the researchers was that athletes can over train themselves into illness.

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Originally posted by King Grub
En bra artikel, fast på engelska:

Overtraining can force the body into a weakened physical state, which, at best can produce a cold or the flu and, at worst, can tear muscles ligaments, and tendons once these body parts lose their structural integrity protein loss.



Genom min värdelösa engelska fick jag fram att musklerna kan i värsta fall brytas ned. Iallafall tack grub.