When your muscles swell up after a workout because of increased blood flow, that puffiness itself doesn’t actually make your muscles grow bigger over time.
Claim Language
Language Strength
definitive
Uses definitive language (causes, prevents, cures)
The phrase 'does not directly contribute to' is definitive because it makes a clear, absolute assertion about the absence of a direct causal role, leaving no room for possibility or probability.
Context Details
Domain
exercise_science
Population
human
Subject
Cell swelling induced by post-exercise hyperemia and capillary dilation
Action
does not directly contribute to
Target
long-term skeletal muscle hypertrophy
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 (2)
Load-induced human skeletal muscle hypertrophy: Mechanisms, myths, and misconceptions
This study says that the muscle pump you feel after working out — caused by blood and fluid swelling — doesn’t actually make your muscles grow bigger over time. Only lifting heavy weights does.
Load-induced human skeletal muscle hypertrophy: Mechanisms, myths, and misconceptions
The study says that the muscle pump you feel after working out — caused by blood swelling in the muscles — doesn’t actually make your muscles grow bigger over time. Only lifting heavy weights does.