Table 1. Results of the tested parameters pre and post intervention.
VFR SS VFR SS VFR SS
Pre Post Pre Post Effects size d or r t-test/ Wilcoxon test Pre (%) Post (%)
Shear modulus
ST (kPa)		 15.6 (±3.2) 14.8* (±3.2) 15.3 (±3.6) 14.3* (±2.9) 0.6 0.7 -6.7 (±10.1) -6.7 (±10.7)
Shear modulus
BFlh (kPa)		 22.5 (±4.7) 22.5 (±4.9) 23.1 (±5.6) 22.7 (±5.5) -1.0 (±12.3) -2.9 (±10.7)
Shear modulus
SM (kPa)		 21.7 (±6.2) 20.6 * (±6.0) 21.5 (±5.3) 20.6 (±5.2) 0.45 0.36 -6.5 (±15.4) -4.9 (±11.9)
ROM (°) 29.3 (±7.2) 32.0* (±6.9) 30.0 (±7.1) 32.2* (±6.9) 1.6 1.4 8.8 (±5.6) 7.7 (±5.5)
CMJ (cm) 47.6 (±5.2) 48.2 (±6.0) 47.4 (±5.9) 46.8 (±5.4) 0.9 (±3.9) -1.4 (±5.4)
MVIC (Nm) 172.2 (±24.8) 173.6 (±25.9) 175.3 (±20.7) 165.8* (±25.3) 0.05 0.37 0.6 (±6.0) -5.1 (±8.4) #
PRT (Nm) 51.8 (±7.9) 51.7 (±8.1) 52.7 (±8.3) 52.8 (±8.2) -0.4 (±5.8) 0.0 (±5.4)
* = significant difference between pre- and post-measurement data# = significant difference between delta values of each group; mean (±SD)VFR= vibration foam rolling, SS= static stretching, ST= semitendinosus, BFlh = biceps femoris long head; SM = semimembranosus; ROM = maximal hip flexion range of motion; CMJ = counter movement jump; MVIC = maximal voluntary isometric contraction peak torque; PRT = passive resistive torque