The Claim
In untrained young adults, eccentric training at 180°/s leads to greater increases in elbow flexor muscle thickness compared to concentric training at either 180°/s or 30°/s after an 8-week intervention, suggesting that faster eccentric contractions may enhance hypertrophic 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.
If you're new to working out, doing elbow curls by slowly lowering the weight (eccentric) faster than you raise it (concentric) might make your biceps grow bigger than doing the same movement slowly or just lifting fast.
See the scientific wording
Eccentric training at 180°/s is associated with greater increases in elbow flexor muscle thickness than concentric training at either 180°/s or 30°/s in untrained young adults after 8 weeks, suggesting faster eccentric contractions may enhance hypertrophic adaptation.
What the research says
1 studyStudy: The effects of eccentric and concentric training at different velocities on muscle hypertrophy
The study found that doing slow-down movements (eccentric) at a fast speed (180°/s) made arm muscles grow more than doing push-up-style movements (concentric), even at the same speed or slower. So yes, fast eccentric training works best for building muscle.
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.