The Claim
In recreationally trained women undergoing biceps-focused resistance training, performing preacher curls that emphasize muscle strain at long muscle lengths is associated with increased muscle thickness in the distal region of the upper arm (measured at 70% of the acromion-to-olecranon distance), with an observed effect size of Cohen’s d = 0.623 and approximately 8.8% growth from baseline, suggesting that regional hypertrophy may be influenced by exercise-specific resistance profiles.
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.
For women who work out regularly, doing preacher curls that stretch the biceps a lot might help build more muscle in the lower part of the upper arm—about an 8.8% increase—compared to other curl types.
See the scientific wording
In recreationally trained women performing biceps-focused resistance training, preacher curls that emphasize muscle strain at long muscle lengths are associated with increased muscle thickness in the distal region of the upper arm (70% of acromion-to-olecranon distance), with a medium effect size (Cohen’s d = 0.623) and approximately 8.8% growth from baseline, suggesting regional hypertrophy may be influenced by exercise-specific resistance profiles.
What the research says
1 studyThe study found that preacher curls helped build more muscle in the lower part of the upper arm in women, which matches what the claim says.
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.