The Effects of Whole-Body Vibration Exercise on Anticipatory Delay of Core Muscles in Patients with Nonspecific Low Back Pain
Table 4
Comparison of relative activation time between/within groups on shoulder abduction ( ± s, unit: ms).
WBV group (n = 20)
Control group (n = 20)
WBV – Control (95% CI)
value
Right ES
Pre-test
184.8 ± 99.8
147.3 ± 159.9
37.5 (−47.8 to 122.8)
0.379
Post-test
117.5 ± 115.4
178.0 ± 130.8
−60.4 (−139 to 18.5)
0.130
value
0.001
0.052
Left ES
Pre-test
162.5 ± 108.8
158.0 ± 104.2
4.5 (−63.7 to 72.7)
0.894
Post-test
57.7 ± 76.7
137.8 ± 77.5
−80.1 (−129.4 to −30.7)
0.002
value
0.000
0.141
Right MF
Pre-test
237.5 ± 97.4
257.6 ± 100.2
−20.1 (−83.4 to 43.1)
0.524
Post-test
144.1 ± 97.1
269.4 ± 196.9
−125.3 (−224.7 to −25.9)
0.015
value
0.001
0.741
Left MF
Pre-test
157.3 ± 90.3
163.0 ± 76.3
−5.7 (−59.2 to 47.8)
0.830
Post-test
105.4 ± 108.9
152.6 ± 81.2
−47.2 (−108.6 to 14.3)
0.129
value
0.009
0.333
Right TrA/IO
Pre-test
165.7 ± 100.4
186.3 ± 122.5
−20.6 (−92.6 to 51.1)
0.564
Post-test
69.4 ± 102.9
166.5 ± 94.4
−97.2 (−160.4 to −34.0)
0.004
value
0.000
0.105
Let TrA/IO
Pre-test
160.7 ± 143.4
195.1 ± 108.6
−34.5 (−115.9 to 47.0)
0.397
Post-test
124.6 ± 206.6
189.0 ± 100.4
−64.5 (−168.4 to 39.5)
0.217
value
0.403
0.508
Right RA
Pre-test
231.3 ± 129.6
258.9 ± 123.1
−27.6 (−108.5 to 53.3)
0.494
Post-test
128.0 ± 99.3
265.3 ± 117.9
−137.3 (−207.1 to −67.5)
0.000
value
0.001
0.584
Left RA
Pre-test
108.8 ± 218.6
166.1 ± 181.9
−57.4 (−186.1 to 71.3)
0.373
Post-test
70.6 ± 127.7
160.1 ± 176.6
−89.5 (−188.1 to 9.2)
0.074
value
0.203
0.452
Relative activation time = muscle onset time-prime mover onset time (ms), a negative value indicated that the target muscle fired before the prime mover, and vice versa. WBV, whole-body vibration; ES, erector spinae; MF, multifidus; TrA/IO, transversus abdominus/internal oblique; RA, rectus abdominis; CI, confidence interval. Values are expressed as mean ± SD.Analyzed by the independent-samples t-test; analyzed by the paired-samples t-test; significant at .
