Table 2.
Effect of acute whole-body vibration exercise on handgrip strength, electromyographic records of the flexor digitorum superficialis muscle, and wrist range of motion (n = 21).
| Variable | Control | Sham | Vibration | Within-interventions | Between-interventions | Interaction | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| p | F | η 2 | Power | p | F | η 2 | Power | p | F | η 2 | Power | ||||
| HS | |||||||||||||||
| Baseline (kg) | 20.03 (16.52-23.54) | 20.68 (17.29-24.07) | 19.38 (16.18-22.58) | 0.0014 | 13.70 | 0.86 | 1.00 | 0.3667 | 1.02 | 0.37 | 0.82 | 0.0178 | 4.24 | 0.73 | 0.99 |
| After (kg) | 20.45 (16.79-24.11) | 20.95 (17.40-24.50) | 21.77 (18.06-25.48)∗# | ||||||||||||
| EMGrms | |||||||||||||||
| Baseline (% rms) | 64.53 (57.77-71.29) | 62.82 (56.83-62.81) | 53.84 (46.93-60.79) | 0.1821 | 1.91 | 0.34 | 0.76 | 0.0002 | 9.29 | 0.87 | 1.00 | 0.7403 | 0.30 | 0.17 | 0.39 |
| After (% rms) | 62.86 (55.64-70.08) | 62.76 (56.81-68.71) | 48.92 (39.34-58.50)# | ||||||||||||
| FLEXION ROM | |||||||||||||||
| Baseline (°) | 79.48 (75.70-83.26) | 77.71 (73.58-81.84) | 77.28 (73.36-81.20) | 0.0059 | 9.48 | 0.77 | 0.99 | 0.6424 | 0.44 | 0.22 | 0.49 | 0.0086 | 5.05 | 0.76 | 0.99 |
| After (°) | 77.67 (73.62-81.72) | 81.10 (77.17-85.03) | 81.57 (76.91-86.23)∗# | ||||||||||||
| Extension ROM | |||||||||||||||
| Baseline (°) | 49.00 (41.37-56.63) | 52.71 (44.50-60.92) | 50.10 (42.86-57.34) | 0.0064 | 9.28 | 0.84 | 1.00 | 0.0218 | 4.01 | 0.62 | 0.99 | 0.0404 | 3.34 | 0.58 | 0.99 |
| After (°) | 51.86 (46.19-57.53) | 53.95 (45.18-62.72) | 58.10 (51.85-64.35)∗# | ||||||||||||
HS: handgrip strength; EMGrms: electromyographic records; ROM: range of motion; whole-body vibration of 45 Hz/2 mm. Measures performed at baseline and after the experimental interventions. Data are presented as mean (95% confidence interval), F values, and eta partial η2. N = 21 subjects in each experimental test. ∗ represents the difference (p < 0.05) compared to baseline. # represents the difference (p < 0.05) between the interventions (after). There was no difference between the interventions at baseline.