Table 1. The mean MVC of knee extension measured before and after vibration and the mean percent change after 20-min vibration stimulation. Data are means (±SD). Type of contraction Pre-Vibration (Nm) Post-Vibration (Nm) F value P value Concentric contraction 192.2 (49.3) 162.3 (47.9) Pre vs. Post 19.04 .0033 Eccentric contraction 299.7 (77.0) 247.3 (88.6) Con vs. Ecc 26.351 .0013 Interaction 3.823 .0915