The Claim
Quadriceps muscle volume increase explains approximately 18.7% of the variation in individual strength gains after 12 weeks of resistance training in healthy young men, indicating that muscle hypertrophy is a significant but secondary contributor compared to neural adaptations.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
After 12 weeks of resistance training in healthy young men, increases in quadriceps muscle size account for about 18.7% of the differences in strength gains, suggesting that changes in muscle size play a role but are less influential than changes in nervous system function.
See the scientific wording
Quadriceps muscle volume increase explains approximately 18.7% of the variation in individual strength gains after 12 weeks of resistance training in healthy young men, indicating that muscle hypertrophy is a significant but secondary contributor compared to neural adaptations.
When you lift weights, your brain sends stronger signals to your thigh muscles, making more muscle fibers fire at the same time and more frequently. At the same time, the muscle fibers themselves get bigger from adding more protein and new nuclei. The stronger signals make you stronger faster and more efficiently, while the bigger muscles give you a little extra force — but most of the improvement comes from your nerves getting better at turning on the muscles.
What the research says
1 studyThis study found that when people do leg strength training for 12 weeks, about 19% of how much stronger they get is because their thigh muscles grow bigger, but most of the improvement comes from their nerves getting better at telling the muscles to work harder.
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.