When young men lift weights, their hormone levels spike right after, but those spikes don’t tell us who’s going to get stronger or bigger — some people grow a lot even with small hormone changes, so something else must be behind why people respond differently.
Claim Language
Language Strength
probability
Uses probability language (may, likely, can)
The claim uses 'does not reliably distinguish', which implies uncertainty and lack of consistent predictive power — not absolute absence or certainty. This is probabilistic language, suggesting the hormonal response may sometimes correlate but is not a dependable indicator.
Context Details
Domain
exercise_science
Population
human
Subject
young men undergoing resistance training
Action
does not reliably distinguish
Target
individuals who are high or low responders to training based on acute systemic hormonal response (GH, cortisol, testosterone, IGF-1)
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)
Even though the guys’ hormones spiked after lifting weights, those spikes didn’t predict who got stronger or built more muscle — meaning something else, like their genes or how their muscles recover, probably matters more.