The Claim
In resistance-trained athletes, performing accentuated eccentric loading squats one, two, or three times per week for 12 weeks results in significant increases in isometric strength (9.1%), concentric strength (9.3%), eccentric strength (14.0%), strength endurance (28.6%), squat jump power (7.3%), countermovement jump power (4.4%), quadriceps cross-sectional area (3.6%), and thigh cross-sectional area (2.1%), with no clinically meaningful differences between frequencies except a small 3.2% greater improvement in concentric strength for three sessions per week compared to one.
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.
Resistance-trained athletes who perform accentuated eccentric loading squats one, two, or three times per week for 12 weeks experience measurable increases in multiple strength and power metrics and muscle size, with only a minor additional benefit in concentric strength when training three times per week instead of once.
See the scientific wording
In resistance-trained athletes, performing accentuated eccentric loading squats one, two, or three times per week for 12 weeks leads to significant increases in isometric strength (9.1%), concentric strength (9.3%), eccentric strength (14.0%), strength endurance (28.6%), squat jump power (7.3%), countermovement jump power (4.4%), quadriceps cross-sectional area (3.6%), and thigh cross-sectional area (2.1%), with no clinically meaningful differences between frequencies except a small 3.2% greater improvement in concentric strength for three sessions per week compared to one.
When muscles are stretched under heavy load during slow lowering movements, the muscle fibers tear slightly and send strong signals to the nervous system. This causes the body to build more muscle tissue and improve how well nerves activate the muscles, making them stronger and able to perform more repetitions without tiring.
What the research says
1 studyThis study found that for trained athletes, doing slow-lowering squats once, twice, or three times a week for three months all led to big gains in strength and muscle size — with almost no difference between them, except a tiny extra boost in pushing strength when doing it three times a week.
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.