quantitative
Analysis v1
Strong Support
Just working out by itself can make you stronger—like lifting things gets easier—but it won’t make your muscles or body bulk up more if you’re losing muscle due to old age or serious illness.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Can conditions of skeletal muscle loss be improved by combining exercise with anabolic–androgenic steroids? A systematic review and meta-analysis of testosterone-based interventions
Systematic Review With Meta-Analysis
Human
2021 JunThe study found that just working out makes muscles stronger by a lot (0.89 effect size) but doesn’t make the body’s lean muscle mass go up much in people with muscle-wasting diseases — which is exactly what 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.