Table 1. Changes (mean ± SD) in knee flexion range of motion (ROM), maximal voluntary isometric contraction torque of knee extensor (MVC-ISO), rate of force development (RFD) at 0-50, 0-100, and 0-200 ms, 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, C x T: condition x time interaction effect; F-value) and partial η2 (ηp2) are shown in right column.
LF-VFR condition HF-VFR condition ANOVA results
PRE POST 20 min PRE POST 20 min P value, F value, ηp2
Knee flexion ROM (deg) 131.5 ± 4.5 135.8 ± 5.0 133.7 ± 5.1 130.9 ± 6.6 135.6 ± 5.6 133.6 ± 6.3 T: p < 0.01, F = 59.3, ηp2 = 0.809
C x T: p = 0.748, F = 0.293, ηp2 = 0.021
MVC-ISO (Nm) 198.2 ± 31.2 189.4 ± 32.8 188.8 ± 29.5 199.7 ± 29.5 188.4 ± 33.5 185.8 ± 31.2 T: p < 0.01, F = 16.5, ηp2 = 0.541
C x T: p = 0.81, F = 0.21, ηp2 = 0.015
RFD at 0-50 ms (Nm/ms) 0.44 ± 0.35 0.51 ± 0.31 0.51 ± 0.22 0.39 ± 0.28 0.54 ± 0.34 0.47 ± 0.26 T: p = 0.27, F = 1.33, ηp2 = 0.044
C x T: p = 0.85, F = 0.16, ηp2 = 0.006
RFD at 0-100 ms (Nm/ms) 0.67 ± 0.30 0.71 ± 0.23 0.79 ± 0.22 0.67 ± 0.27 0.70 ± 0.32 0.71 ± 0.25 T: p = 0.47, F = 0.77, ηp2 = 0.026
C x T: p = 0.15, F = 0.861, ηp2 = 0.005
RFD at 0-200 ms (Nm/ms) 0.59 ± 0.19 0.63 ± 0.13 0.69 ± 0.12 0.60 ± 0.17 0.60 ± 0.19 0.64 ± 0.11 T: p = 0.19, F = 1.69, ηp2 = 0.06
C x T: p = 0.37, F = 0.37, ηp2 = 0.012
MVC-CON (Nm) 193.1 ± 31.2 178.6 ± 23.7 175.2 ± 24.4 195.4 ± 32.4 175.3 ± 22.3 172.2 ± 26.1 T: p < 0.01, F = 8.61, ηp2 = 0.381
C x T: p = 0.38, F = 1.00, ηp2 = 0.067
CMJ height (cm) 22.2 ± 3.7 22.4 ± 3.6 22.4 ± 3.1 21.8 ± 3.5 21.9 ± 3.9 21.7 ± 3.4 T: p = 0.298, F = 1.26, ηp2 = 0.083
C x T: p = 0.88, F = 0.126, ηp2 = 0.009
PPT (kg) 3.5 ± 1.4 4.7 ± 1.9 3.9 ± 1.5 3.3 ± 1.6 4.3 ± 1.7 4.2 ± 2.2 T: p < 0.01, F = 10.8, ηp2 = 0.437
C x T: p = 0.25, F = 1.45, ηp2 = 0.094