When you exercise with less oxygen in your muscles—like training at high altitude or with special gear—you might build more muscle than when you train normally, because your muscles get more 'starved' for oxygen, which could trigger bigger growth.

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Pro

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Against

Evidence from Studies

Supporting (1)

46

Community contributions welcome

46

Effects of low-intensity resistance exercise with slow movement and tonic force generation on muscular function in young men.

Randomized Controlled Trial

Human

2006 Apr

The study found that doing slow, sustained muscle contractions with light weights made muscles more oxygen-deprived and also made them grow bigger, while doing the same light weights at normal speed didn’t. So yes, being low on oxygen in the muscle seems to help muscles grow.

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Effects of low-intensity resistance exercise with slow movement and tonic force generation on muscular function in young men.

Score: 46

DOI: 10.1152/JAPPLPHYSIOL.00741.2005

Similar Assertions

When young men lift weights, how much oxygen is in their muscles affects how much their muscles grow bigger. Less oxygen in the muscles during exercise seems linked to better muscle growth results.

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A certain type of weight training keeps your muscles working non-stop, making them use more oxygen and possibly grow bigger because of changes inside your body.

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Doing slow, controlled weight lifts with light weights can make your muscles use up more oxygen during the workout than doing the same lifts fast or lifting heavy weights—even if the heavy lifting feels harder.

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