The Claim
In untrained males performing unilateral knee extensions to failure at 50–60% of one-repetition maximum, resistance training protocols using 2-second and 6-second repetition durations result in similar increases in rectus femoris and vastus lateralis muscle cross-sectional area when measured across multiple anatomical sites along 40–70% of femur length, suggesting equivalent hypertrophic responses despite differences in time under tension and total repetition count.
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 new guys do leg exercises to failure using medium weights, slowing down the movement doesn’t make their muscles grow more than doing faster reps — both ways work about the same.
See the scientific wording
In untrained males performing unilateral knee extensions to failure at 50–60% 1RM, resistance training protocols with 2-second and 6-second repetition durations produce similar increases in rectus femoris and vastus lateralis muscle cross-sectional area when assessed across multiple anatomical sites (40–70% femur length), indicating comparable hypertrophic stimuli despite differing time under tension and repetition counts.
What the research says
1 studyThe study found that slow and medium-speed leg exercises led to the same amount of muscle growth in untrained men, even though the workouts felt different.
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.