Even though your body releases muscle-building hormones like testosterone after a workout, those spikes don’t actually help you grow bigger muscles over time—no matter if you’re a man, a woman, or a beginner or pro.

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Evidence from Studies

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Load-induced human skeletal muscle hypertrophy: Mechanisms, myths, and misconceptions

Narrative Review

2025 Nov 21

This study says that even though lifting weights makes your body release hormones like testosterone, those hormones don’t actually make your muscles grow bigger—what matters is how hard you lift, not how much hormone you make.

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Source Study

Load-induced human skeletal muscle hypertrophy: Mechanisms, myths, and misconceptions

Score: 1

DOI: 10.1016/j.jshs.2025.101104

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