Why your muscles get stronger before they get bigger
The increase in muscle force after 4 weeks of strength training is mediated by adaptations in motor unit recruitment and rate coding
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Your muscles get stronger faster than they grow because your nerves learn to fire better. This study found that after 4 weeks of ankle exercises, nerves sent stronger signals to the muscle without making the muscle bigger.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 538 / 90
Evidence Score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Your muscles get stronger faster than they grow because your nerves learn to fire better. This study found that after 4 weeks of ankle exercises, nerves sent stronger signals to the muscle without making the muscle bigger.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 538 / 90
Evidence Score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Publication
Authors
Del Vecchio A, Casolo A, Negro F, Scorcelletti M, Bazzucchi I, Enoka R, Felici F, Farina D
Related Content
Claims (7)
Strength expression is highly movement-specific, but in untrained individuals, neuromuscular adaptation from compound movements can produce greater strength gains in target movements than direct practice due to enhanced motor unit recruitment and coordination.
When you first start lifting weights, you get stronger not because your muscles grow bigger right away, but because your brain gets better at telling your muscles when and how to contract.
After four weeks of strong, held ankle lifts, your nerve signals to the muscle get faster during moderate efforts, making your muscle stronger without needing more muscle mass.
Even though your nerves fire faster after training, they still respond to how hard you’re trying at the same rate—your brain’s control system didn’t get more sensitive.
After training, your tendons get a bit looser, so your muscles can start working sooner when you try to push, making you feel stronger faster.