The Claim
In healthy adult males, resistance training is associated with a negative relationship between the number of sets performed per workout and muscle mass gain, such that each additional set per session is linked to a small but statistically significant reduction in hypertrophy, with a moderator estimate of −0.03 kg per set, suggesting that excessive volume may impair muscle gains.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
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.
See the scientific wording
Resistance training is associated with a negative relationship between the number of sets per workout and muscle mass gain, with each additional set per session linked to a small but statistically significant reduction in hypertrophy (moderator estimate: −0.03 kg per set), suggesting excessive volume may impair gains in healthy adult males.
What the research says
1 studyThis study found that doing more sets in a workout doesn’t always mean more muscle — after a certain point, each extra set actually leads to slightly less muscle gain, which matches the claim exactly.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.