Table 4. The effects of 12-week whole body vibration training on muscle strength and endurance. All values were presented as mean (± SD).
ANOVA
VT CON unpaired-t test
(baseline)
Group Time Group-by-
Time
n = 10 n = 8 df t p F p F p F p
Maximal isometric lumbar extension strength (SI/kg)
pre 149.6 (54.6) 135.0 (45.3) 1,16 -.61 .55 .13 .72 18.29 .001 .79 .39
post 169.8 (68.7) 165.8 (46.3)
Maximal isokinetic knee extension-con- (Nm/kg)
pre 1.92 (.48) 1.53 (.80) 1,16 1.28 .22 1.95 .18 2.53 .13 .15 .70
post 2.13 (.50) 1.66 (.96)
Maximal isokinetic knee extension-ecc- (Nm/kg)
pre 2.34 (.79) 2.05 (.86) 1,16 .75 .46 .82 .38 2.65 .12 .37 .55
post 2.59 (.85) 2.17 (1.00)
Maximal isokinetic knee flexion - con- (Nm/kg)
pre 1.00 (.25) .78 (.38) 1,16 1.54 .14 2.49 .13 16.85 .001 .04 .84
post 1.22 (.31) .97 (.40)
Maximal isokinetic knee flexion- ecc- (Nm/kg)
pre 1.29 (.22) 1.02 (.34) 1,16 2.02 .06 4.61 .05 3.56 .08 .09 .77
post 1.43 (.31) 1.12 (.38)
Number of sit-ups (time)
pre 18.1 (4.5) 17.6 (4.3) 1,16 -.23 .82 .18 .67 39.56 .001 1.80 .20
post 20.8 (5.2) 19.4 (4.7)
CON, control group; VT, Vibration training group; con: concentric contraction; ecc: eccentric contraction; SI: strength index.