Table 2.

The comparison of %MVIC in each of the groups at pre- and posttest

Variable	Pretest	Posttest	Difference value	T-value	P-value
Rectus femoris
VFR	15.12±7.09	20.79±8.25	5.67±4.23	3.786	0.007
NVFR	16.76±7.39	19.42±8.96	2.67±2.08	3.631	0.008
T-value	−0.453		2.781
P-value	0.657		0.015
Vastus lateralis
VFR	16.79±6.65	20.93±6.16	4.14±2.84	4.120	0.004
NVFR	17.15±5.75	16.20±6.50	−0.95±1.81	−1.476	0.184
T-value	−0.116		4.267
P-value	0.909		0.001
Vastus medialis
VFR	14.28±5.50	19.24±9.03	4.96±5.84	2.402	0.047
NVFR	17.81±7.38	18.08±6.11	0.26±4.23	0.175	0.866
T-value	−1.085		1.843
P-value	0.296		0.087

Values are presented as mean±standard deviation.

%MVIC, %maximum voluntary isometric contraction; VFR, vibration foam roller; NVFR, nonvibration foam roller.