The Claim
In untrained adults, performing either single-joint knee extensions or multi-joint leg presses at 70% of one-repetition maximum for 5 sets of 10 repetitions, conducted twice per week over 12 weeks, is associated with comparable hypertrophic gains in the vasti muscles (ranging from 4.4% to 7.2%) and overall quadriceps femoris muscle volume, suggesting both exercise modalities are similarly effective for targeting these muscle groups.
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.
If you're new to working out, doing leg presses or knee extensions twice a week for 12 weeks will grow your thigh muscles about the same amount—so pick the one you like!
See the scientific wording
In untrained adults, both single-joint knee extensions and multi-joint leg presses (70% 1RM, 5 sets of 10 reps, 2 sessions/week for 12 weeks) are associated with similar hypertrophic gains in the vasti muscles (ranging from 4.4% to 7.2%) and overall quadriceps femoris volume, indicating that either modality can effectively target these areas.
What the research says
1 studyThe study shows that both leg presses and knee extensions work equally well for growing the main parts of the quadriceps muscles in beginners, just like 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.