More Sets Doesn't Mean More Muscles
A Systematic Review with Meta-Analysis of the Effect of Resistance Training on Whole-Body Muscle Growth in Healthy Adult Males
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Training experience didn’t consistently predict muscle gain — even though high-gain outliers had 4+ years of experience.
Everyone assumes seasoned lifters gain more muscle faster — but the data shows experience doesn’t reliably boost gains in this population.
Practical Takeaways
Stick to 3–6 sets per muscle group per workout — going beyond 8–10 may reduce your gains.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Training experience didn’t consistently predict muscle gain — even though high-gain outliers had 4+ years of experience.
Everyone assumes seasoned lifters gain more muscle faster — but the data shows experience doesn’t reliably boost gains in this population.
Practical Takeaways
Stick to 3–6 sets per muscle group per workout — going beyond 8–10 may reduce your gains.
Publication
Journal
International Journal of Environmental Research and Public Health
Year
2020
Authors
P. Benito, R. Cupeiro, D. Ramos-Campo, P. Alcaraz, J. Rubio-Arias
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Claims (6)
When you lift weights over time, the main reason your body becomes leaner and more muscular is because your muscles grow bigger—not because you're losing fat or anything else.
Doing more sets in your weight workouts might actually make you gain less muscle—each extra set could slightly reduce your muscle growth, so more isn’t always better.
If healthy guys between 18 and 40 lift weights regularly for at least two weeks up to a year, they typically gain about 1.5 kilograms of muscle—no matter what kind of weight routine they follow.
If you're a healthy man between 18 and 40 years old, doing strength training will help you build muscle at about the same rate no matter your exact age in that range.
If you're a guy between 18 and 40 and you start lifting weights, whether you're new to it or have been doing it for years, you probably won't gain much more muscle just because you're experienced—but the people who’ve trained the longest (4+ years) still tend to gain the most muscle, so experience doesn’t always make a clear difference.