If your goal is to maximize muscle growth, focusing on fewer muscle groups per session might be your best bet. Recent research suggests that training too many muscle groups at once could create a “competition for resources,” potentially limiting gains, especially during periods of low energy availability. This finding emphasizes the value of a split routine for those targeting specific muscle development.
Read the full study here: https://doi.org/10.1016/j.mehy.2024.111525.

Mass Explosion: Blast Through Your Training Plateaus
Tired of spinning your wheels in the gym? Mass Explosion is your complete system for breaking plateaus and packing on muscle—naturally.
Developed by fitness expert John Paul Catanzaro, this guide combines cutting-edge science with proven methods to help you:
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Build dense, powerful muscle without drugs.
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Smash through training plateaus with advanced techniques.
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Maximize recovery, nutrition, and supplementation for nonstop growth.
If you’re serious about size and strength, this book is your step-by-step roadmap to explosive gains.