Table 1. Muscle activity of the upper (UES) and lower (LES) part of the erector spinae muscle, upper (URA) and lower (LRA) part of the rectus abdominis muscle, and splenius muscle (SPL) with different vibration peak amplitudes (1.3 mm and 3.9 mm) and knee angles (30° and 45°) during whole-body vibration (WBV) and without vibration stimulus (CON). In addition, the increase in EMG
%MVC level (DIF) between WBV and CON condition is shown. Values are presented as a percentage of the muscle activity during an isolated MVC (100%). Values are mean (± SE).
|
1.3 mm |
3.9 mm |
| 30° |
45° |
30° |
45° |
| UES |
CON |
8.6 (1.4) |
12.5 (1.5) |
8.1 (1.2) |
13.0 (1.7) |
| WBV |
15.4 (1.6) |
17.7 (1.7) |
27.2 (2.0) |
26.3 (2.2) |
| DIF |
+6.8 * |
+5.2 * |
+19.1 * |
+13.3 * |
| LES |
CON |
9.0 (1.2) |
12.9 (1.5) |
8.8 (1.1) |
12.7 (1.5) |
| WBV |
16.1 (1.3) |
17.6 (1.6) |
27.0 (1.6) |
25.8 (2.4) |
| DIF |
+7.1 * |
+4.7 * |
+18.2* |
+13.1* |
| URA |
CON |
2.9 (0.8) |
3.0 (0.9) |
3.0 (0.9) |
3.1 (1.0) |
| WBV |
3.6 (1.0) |
3.8 (1.0) |
6.0 (1.1) |
5.6 (1.0) |
| DIF |
+0.7 * |
+0.8 * |
+3.0 * |
+2.5 * |
| LRA |
CON |
2.2 (0.3) |
2.3 (0.4) |
2.2 (0.4) |
2.2 (0.3) |
| WBV |
3.3 (0.6) |
3.2 (0.5) |
5.7 (1.0) |
5.8 (0.9) |
| DIF |
+1.1 * |
+0.9 * |
+3.5 * |
+3.6 * |
| SPL |
CON |
3.6 (0.4) |
4.2 (0.4) |
3.8 (0.4) |
3.7 (0.4) |
| WBV |
4.8 (0.5) |
5.4 (0.7) |
8.5 (1.6) |
7.9 (1.4) |
| DIF |
+1.2 * |
+1.2 * |
+4.7 * |
+4.2 * |
* Significant increase in muscle activity WBV-CON (p ≤ 0.05).
