causal
Analysis v1
Strong Support
Doing gentle weight training slowly twice a week for 13 weeks makes young men's muscles about 7% bigger and 33% stronger, almost as much as regular heavy lifting, which made muscles 9% bigger and 41% stronger.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Effects of Whole-Body Low-Intensity Resistance Training With Slow Movement and Tonic Force Generation on Muscular Size and Strength in Young Men
Randomized Controlled Trial
Human
2008 NovThe study tested the exact same slow-motion weight training described in the claim and found it builds muscle and strength almost as well as regular fast training, just like the claim says.
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.