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Metabolic Stress & Hypertrophy: do metabolites create muscle growth ?

Discussion in 'Training' started by Zillagreybeard, May 12, 2022.
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Zillagreybeard
Zillagreybeard
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  • May 12, 2022
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Metabolic Stress & Hypertrophy: do metabolites create muscle growth ?⭕️ ⁣

In the old model of hypertrophy, 3 were thought to be the “main” ways through which hypertrophy can be mediated: ⁣

1) Mechanical Tension⁣
2) Metabolic Stress⁣
3) Muscle Damage (which we’ve already seen it actually doesn’t cause muscle growth by itself)

But if point 3 is “out” of the triade, then let’s see whether or not metabolic stress is actually a separate (or different ?) way through which muscle growth occurs. ⁣

When we’re performing a long training set and our muscle fibers fatigue, metabolites accumulate within our muscle cells. Due to fatiguing mechanisms motor unit recruitment increases, because our CNS perceives progressively greater levels of effort during the set.

This causes higher threshold motor units to be recruited and muscle more muscle fibers to be activated: as fibers keep working, they experience greater levels of mechanical tension, which is what ultimately leads to muscle growth, over time. ⁣

So all in all, although it was previously believed that the hypertrophic mechanisms were 3, in reality it seems that Mechanical Tension is the main – and likely the only – (independent) driver of muscle growth.

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