Doing moderate, steady exercise doesn’t seem to change key muscle genes linked to making new mitochondria — the cell’s power plants — so the benefits might come from making existing ones bigger or merging them, not creating new ones.

49

Pro

0

Against

Evidence from Studies

Supporting (1)

49

Community contributions welcome

49

Markers of clinical and mitochondrial adaptation in response to moderate intensity continuous training: A systematic review and meta-analysis

Systematic Review With Meta-Analysis

Human

2026

The study looked at how moderate exercise affects muscle cells and found no change in key proteins linked to making new mitochondria, which supports the idea that improvements come from changing existing ones instead.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

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

Markers of clinical and mitochondrial adaptation in response to moderate intensity continuous training: A systematic review and meta-analysis

Score: 49

DOI: 10.1371/journal.pone.0339902

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