TABLE 3
Effect size and power test for comparison of chest wall volumes and percentage of respiratory muscle activation intensity between quiet spontaneous breathing, breathing against inspiratory load and recovery periods
| MIP20% group | MIP40% group | |||
Effect size partial Eta  | Power | Effect size partial Eta  | Power | |
| VT | ||||
| Pressure threshold | 0.74 | 0.99 | 0.80 | 0.99 |
| Flow resistance | 0.86 | 0.99 | 0.90 | 0.99 |
| EIV | ||||
| Pressure threshold | 0.68 | 0.98 | 0.63 | 0.97 |
| Flow resistance | 0.79 | 0.99 | 0.74 | 0.99 |
| EEV | ||||
| Pressure threshold | 0.1 | 0.13 | 0.1 | 0.14 |
| Flow resistance | 0.24 | 0.31 | 0.28 | 0.42 |
| SCM | ||||
| Pressure threshold | 0.42 | 0.63 | 0.43 | 0.7 |
| Flow resistance | 0.6 | 0.93 | 0.48 | 0.79 |
| SCL | ||||
| Pressure threshold | 0.43 | 0.66 | 0.73 | 0.99 |
| Flow resistance | 0.57 | 0.89 | 0.7 | 0.99 |
MIP: maximal inspiratory pressure; VT: tidal volume; EIV: end-inspiratory volume; EEV: end-expiratory volume; SCM: sternocleidomastoid; SCL: scalene.