More Sets = Bigger Arms? Maybe.
Muscle Hypertrophy Responses to Changes in Training Volume: A Retrospective Analysis
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
No significant difference between moderate (0–50%) and high (>50%) volume groups.
Most people assume more volume = more gains linearly, but this shows a threshold effect: you need to jump past 50% to see any benefit, and going from 50% to 100% more doesn’t help much more.
Practical Takeaways
If you're plateauing, try increasing your weekly arm volume by at least 50% for 6–8 weeks—e.g., from 10 to 15 sets for biceps.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
No significant difference between moderate (0–50%) and high (>50%) volume groups.
Most people assume more volume = more gains linearly, but this shows a threshold effect: you need to jump past 50% to see any benefit, and going from 50% to 100% more doesn’t help much more.
Practical Takeaways
If you're plateauing, try increasing your weekly arm volume by at least 50% for 6–8 weeks—e.g., from 10 to 15 sets for biceps.
Publication
Journal
International Journal of Sports Medicine
Year
2022
Authors
J. B. D. de Camargo, Paulo Henrique Barbosa, F. Brigatto, T. V. Braz, C. Lopes
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Claims (6)
The more you work each muscle group per week—with the right exercises that really engage the muscle—the more your muscles will grow, and this is the #1 thing that matters for building muscle.
If you're already strength training and you do more sets of bicep exercises each week, your biceps tend to get thicker — and this link isn't just luck, it's a real pattern.
If you're someone who regularly lifts weights, doing more triceps exercises each week might help your triceps muscles get a little bigger—but only a little, and not as much as it helps your biceps.
If you're lifting weights regularly, doing more reps and sets might make your biceps grow bigger, but it doesn't seem to help your triceps grow as much—your arms might just respond differently to extra work.
If you're already strength training, doing more sets and reps doesn't always mean your arms and shoulders will grow much bigger—other things like rest, diet, and genetics also play a big role.