Just because a study doesn’t find a clear difference in arm muscle growth between two curl types, it doesn’t mean there isn’t a real difference — the study might just be too small to catch it.
Evidence from Studies
Supporting (3)
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The effects of shoulder extension angle on elbow flexor hypertrophy in the cable curl exercise
The study didn’t find a clear winner between two arm curl types, but because it had few participants, it couldn’t rule out that one might still be better. This matches the idea that no clear result doesn’t mean there’s no real difference.
The study didn’t find a clear winner between two curl types for arm growth, but the results suggest one might still be better — we just can’t tell for sure because the study was too small. This supports the idea that no clear difference doesn’t mean there isn’t one.
The study found that one arm exercise might build muscle slightly more than another, but the difference wasn’t strong enough to be sure. This supports the idea that small studies might miss real differences.
Contradicting (0)
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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.