The effects of eccentric training vs concentric on muscle strength and mass
A meta-analysis from 2009 including 20 studies shows higher increases in total and eccentric muscle strength and higher increases in muscle mass and cross-sectional area with high-intensity eccentric training.
“Meta-analyses showed that when eccentric exercise was performed at higher intensities compared with concentric training, total strength and eccentric strength increased more significantly.”
“..the superiority of eccentric training to increase muscle strength and mass appears to be related to the higher loads developed during eccentric contractions”
This is when we say, “told you so!”.