The Claim
In untrained young adults, performing barbell squats with a 4-second eccentric phase for 7 weeks results in a greater increase in one-repetition maximum strength (effect size = 1.60) compared to a 1-second eccentric phase (effect size = 0.99), with a statistically significant between-group difference (p < 0.05).
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.
Untrained young adults who perform barbell squats with a 4-second lowering phase for 7 weeks gain more maximum strength than those who use a 1-second lowering phase, with a statistically significant difference in strength gains.
See the scientific wording
In untrained young adults, performing barbell squats with a 4-second eccentric phase for 7 weeks results in a greater increase in one-repetition maximum strength (effect size = 1.60) compared to a 1-second eccentric phase (effect size = 0.99), with a statistically significant between-group difference (p < 0.05).
When someone lowers a heavy weight slowly during a squat, the muscle fibers in the front of the thigh that work for endurance grow bigger. These bigger fibers produce more force, which lets the person lift heavier weights overall.
What the research says
1 studyIn beginners, slowly lowering the barbell during squats for 4 seconds led to bigger strength gains than doing it quickly in 1 second — and the study proved this difference was real and not just luck.
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.