The Claim
Over a 10-week period, repeated eccentric and concentric resistance training produce comparable, mode-specific strength gains in the knee extensors of healthy young men, indicating that muscle damage is not a necessary condition for hypertrophy or strength adaptation.
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.
Lifting weights slowly (eccentric) or quickly (concentric) both make your quads stronger in about 10 weeks — and you don’t need to be sore or damaged to get stronger.
See the scientific wording
Repeated eccentric or concentric resistance training over 10 weeks leads to comparable, mode-specific strength gains in knee extensors of healthy young men, demonstrating that muscle damage is not a prerequisite for hypertrophy or strength adaptation.
What the research says
1 studyStudy: Eccentric exercise per se does not affect muscle damage biomarkers: early and late phase adaptations
The study showed identical strength improvements in both eccentric and concentric groups despite the absence of damage biomarkers in the eccentric group after week 2. This directly contradicts the belief that muscle damage is necessary for strength gains.
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.