If a guy who already lifts weights takes a high dose of testosterone and keeps training hard for 10 weeks, he’ll gain a lot more muscle and strength than if he just took the hormone or just trained alone.
Claim Language
Language Strength
definitive
Uses definitive language (causes, prevents, cures)
The claim uses definitive verbs such as 'increases' and 'producing significantly greater gains,' which imply direct cause-and-effect relationships without hedging language like 'may' or 'associated with.'
Context Details
Domain
exercise_science
Population
human
Subject
healthy, experienced male weightlifters
Action
increases
Target
fat-free mass by 6.1 kg, triceps muscle area by 501 mm², quadriceps area by 1174 mm², and bench-press strength by 22 kg
Intervention Details
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.
Evidence from Studies
Supporting (1)
The effects of supraphysiologic doses of testosterone on muscle size and strength in normal men.
The study gave men high doses of testosterone and had them lift weights for 10 weeks — and they got much bigger and stronger than those who only took the hormone or only lifted weights. The numbers in the study match the claim exactly.