The Claim
Mechanical tension generated during resistance training is the primary and essential driver of skeletal muscle hypertrophy in humans, acting through mechanotransductive signaling pathways such as mTORC1 and FAK, independent of hormonal or metabolic stress responses, because it directly initiates intracellular anabolic signaling that increases muscle protein synthesis over time.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When you lift weights, the pulling force on your muscles is what makes them grow bigger—not hormones or feeling tired. This force turns on internal signals that tell your muscles to make more protein and get larger over time.
See the scientific wording
Mechanical tension generated during resistance training is the primary and essential driver of skeletal muscle hypertrophy in humans, acting through mechanotransductive signaling pathways such as mTORC1 and FAK, independent of hormonal or metabolic stress responses, because it directly initiates intracellular anabolic signaling that increases muscle protein synthesis over time.
What the research says
1 studyStudy: Load-induced human skeletal muscle hypertrophy: Mechanisms, myths, and misconceptions
This study says lifting weights creates tension in muscles, and that tension alone is what makes muscles grow — not hormones or burning sensations. It says other popular ideas about muscle growth are wrong, which matches the claim.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.