The Claim
Increasing resistance training volume from one to four sets per session causes a mean increase of 3.02 cm² in quadriceps muscle hypertrophy in older adults who do not respond to low-volume training after 10 weeks.
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 older adults who do not build muscle with low-volume resistance training, increasing the number of sets from one to four per session results in a measurable increase of 3.02 cm² in quadriceps muscle size after 10 weeks.
See the scientific wording
Increasing resistance training volume from one to four sets per session significantly improves quadriceps muscle hypertrophy in older adults who do not respond to low-volume training, with a mean increase of 3.02 cm² after 10 weeks, suggesting that higher volume can mitigate individual nonresponsiveness to exercise.
When muscles are worked harder with more repetitions and sets, the physical stress on muscle fibers turns on a molecular signal that tells the cell to build more muscle proteins. This signal activates a chain of reactions that boosts the cell's ability to make new muscle fibers, leading to thicker muscle fibers and larger muscle size.
What the research says
1 studyIn older people who don’t gain muscle from doing just one set of exercises, doing four sets instead helps them build noticeably more muscle in their thighs after 10 weeks — exactly 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.