The Claim
Single-joint biceps curl resistance training produced 11.06% hypertrophy of elbow flexors, compared to 5.16% hypertrophy from multi-joint dumbbell row training, after 8 weeks in 10 untrained male participants.
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.
When men who hadn't trained before did bicep curls (a single-joint exercise) for 8 weeks, their arm muscles grew about 11%. But when they did dumbbell rows (a multi-joint exercise) instead, their muscles only grew about 5%.
See the scientific wording
Single-joint biceps curl exercise produced 11.06% hypertrophy of elbow flexors compared to 5.16% from multi-joint dumbbell row exercise after 8 weeks of resistance training in 10 untrained men
What the research says
1 studyStudy: Single-Joint Exercise Results in Higher Hypertrophy of Elbow Flexors Than Multijoint Exercise
The study directly confirms the claim - when untrained men did biceps curls, their arm muscles grew about 11%, but when they did dumbbell rows, muscles only grew about 5% after 8 weeks. The study matches the claim exactly in terms of exercises, people, duration, and results.
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.