Table 1. Changes (mean ± SD) in knee flexion range of motion (ROM), maximal voluntary isometric contraction torque of knee extensor at 70° (MVC-ISO), maximal voluntary concentric contraction torque (MVC-CON) at 60°/s, counter movement jump (CMJ) height before maximal eccentric contraction task (baseline), pre- and post-vibration foam rolling (VFR) intervention at both low-frequency (LF)- and high-frequency (HF) intervention. The two-way ANOVA results (T: time effect, G x T: group x time interaction effect; F-value) and partial η2 (ηp2) are shown in right column.
LF-VFR Group (N = 14) HF-VFR Group (N = 14) ANOVA results
Baseline Pre-intervention Post-intervention Baseline Pre-intervention Post-intervention P value, F value, ηp2
Knee flexion
ROM (°)		 139.6 ± 6.0 126.5 ± 12.7*†  133.7 ± 8.6#†  135.9 ± 6.1 94.6 ± 9.9* 109.8 ± 6.3*# T: p < 0.01, F = 113.3, ηp2 = 0.813 G x T: p < 0.01, F = 32.0, ηp2 = 0.552
MVC-ISO
(Nm)		 209.4 ± 33.7 121.2± 34.6* 135.5 ± 41.2* 217.3 ± 26.1 147.2 ± 56.0* 153.0 ± 54.5* T: p < 0.01, F = 42.8, ηp2 = 0.622 G x T: p =0.45, F = 0.62, ηp2 = 0.018
MVC-CON
(Nm)		 164.6 ± 23.8 103.6 ± 38.4* 107.9 ± 38.1* 171.9 ± 17.2 111.1 ± 42.8* 121.8 ± 40.5* T: p < 0.01, F = 36.3, ηp2 = 0.583 G x T: p = 0.89, F = 0.12, ηp2 = 0.004
CMJ height
(cm)		 19.7 ± 3.3 14.3 ± 3.8* 15.7 ± 3.9* # 21.4 ± 4.5 15.8 ± 6.3* 17.9 ± 6.8# T: p < 0.01, F = 34.3, ηp2 = 0.569 G x T: p = 0.88, F = 0.13, ηp2 = 0.005
*: A significantly (p < 0.05) different from the baseline value;#: A significantly (p < 0.05) different from the pre-intervention value;† : A significantly (p < 0.05) different from HF-VFR group.