Table 2.
Surface EMG parameters of diaphragm and external intercostals before and after MVV maneuvers.
| Pretest | Posttest | Recovery | p-value | |
|---|---|---|---|---|
| PImax (cmH2O) | 62.2±14.0 | 49.0±16.5* | 56.4±14.1*# | 0.000 |
| Diaphragm | ||||
| RMS (μV) | 58.5±13.2 | 47.9±12.1* | 51.5±15.8* | 0.000 |
| Median frequency (Hz) | 101.8±16.2 | 89.7±14.4* | 91.7±16.7* | 0.000 |
| CMAP latency (ms) | 5.80±0.39 | 5.74±0.40 | 5.80±0.40 | 0.928 |
| CMAP amplitude (μV) | 650.2±314.2 | 619.2±263.5 | 673.0±311.3 | 0.238 |
| External intercostals | ||||
| RMS (μV) | 88.9±44.5 | 80.7±35.5 | 90.5±47.9 | 0.206 |
| Median frequency (Hz) | 100.9±12.9 | 94.3±10.5* | 97.3±13.3 | 0.013 |
| CMAP latency (ms) | 3.42±0.29 | 3.38±0.21 | 3.38±0.23 | 0.408 |
| CMAP amplitude (μV) | 879.6±273.8 | 850.8±262.0 | 879.3±265.0 | 0.057 |
*
p<0.05, comparisons of posttest vs pretest or recovery vs pretest.
#
p<0.05, comparison between recovery and posttest.