The Claim
In untrained young men, a single-set resistance training protocol produces the same magnitude of strength gains in the elbow flexors as a three-set protocol over a six-week intervention period.
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.
In untrained young men, doing one set or three sets of elbow flexor exercises per session results in the same increase in strength after six weeks.
See the scientific wording
In untrained young men, single-set and three-set training protocols produce similar strength gains in the elbow flexors over six weeks, indicating that higher training volume may not be necessary for early-phase upper body strength development.
When someone starts lifting weights, their nervous system gets better at turning on muscle fibers quickly and efficiently. This happens without the muscle getting bigger. The brain and spinal cord learn to send stronger and more coordinated signals to the biceps, so more fibers contract at once. This improvement happens just as much with one set as with three sets, because the body’s first priority is learning how to use the muscle, not growing it.
What the research says
1 studyFor people just starting to lift weights, doing one set of bicep exercises twice a week builds just as much strength as doing three sets — at least at first. The study found this to be true for the biceps, even though more sets helped more for leg muscles.
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.