The Claim
In resistance-trained men, performing five sets per exercise per session for eight weeks results in significantly greater increases in muscle thickness of the elbow flexors, mid-thigh, and lateral thigh compared to performing one set per session, indicating that higher training volume promotes greater muscle hypertrophy in trained individuals.
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 men who regularly lift weights, doing five sets of each exercise per workout for eight weeks causes larger increases in muscle thickness in the upper arm, mid-thigh, and outer thigh than doing one set per workout.
See the scientific wording
In resistance-trained men, performing five sets per exercise per session for eight weeks leads to significantly greater increases in muscle thickness of the elbow flexors, mid-thigh, and lateral thigh compared to performing one set per session, indicating that higher training volume promotes greater muscle hypertrophy in trained individuals.
Doing more sets of exercises causes muscles to experience more force and buildup of metabolic byproducts during contractions. This triggers a cellular signal that turns on protein building machinery, leading to more muscle protein being made than broken down over time. The extra protein gets added to muscle fibers, making them thicker.
What the research says
1 studyStudy: Resistance Training Volume Enhances Muscle Hypertrophy but Not Strength in Trained Men
For guys who already lift weights, doing five sets of each exercise instead of just one set over eight weeks made their biceps and thighs grow more — even though it took longer. More sets = more muscle growth.
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.