The Claim
Resistance training in humans increases both mTORC1 and PGC-1α signaling in skeletal muscle, indicating that these pathways are not mutually inhibitory and may act synergistically.
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.
Resistance training in humans increases activity in two key muscle signaling pathways, mTORC1 and PGC-1α, at the same time, showing they can operate together rather than block each other.
See the scientific wording
Resistance training in humans simultaneously increases both mTORC1 and PGC-1α signaling in skeletal muscle, challenging the hypothesis that these pathways are mutually inhibitory and suggesting potential synergistic adaptation.
When muscles are stressed during resistance training, a molecular switch called mTORC1 turns on and starts two processes at once: it builds bigger muscle fibers by making more proteins, and it creates more energy-producing factories inside the muscle cells by activating genes that make mitochondria. This happens because mTORC1 directly activates a protein called YY1 that turns on mitochondrial genes, and it also frees up another protein called 4E-BP1 to help produce the tools needed for mitochondrial growth. Both processes occur together without blocking each other.
What the research says
1 studyStrength training in people turns on both the muscle-growth engine (mTORC1) and the energy-production engine (PGC-1α) at the same time, which means they don’t fight each other like scientists once thought—they actually work together.
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.