Table A8.
Comparison of all face masks including mask condition, cardiorespiratory fitness, and the interaction term face mask condition x cardiorespiratory fitness—linear mixed model 5.
| Model | Outcome Parameter | Dependent Variable | Degree of Freedom | F-Value | p-Value |
| 5 | PWC130 | Face mask condition | 3 | 0.754 | 0.522 |
| Cardiorespiartory fitness | 1 | 64.576 | < 0.001 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 1.884 | 0.137 | ||
| SpO2 | Face mask condition | 3 | 1.526 | 0.213 | |
| Cardiorespiartory fitness | 1 | 0.584 | 0.45 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 2.198 | 0.093 | ||
| tcPCO2 | Face mask condition | 3 | 2.182 | 0.095 | |
| Cardiorespiartory fitness | 1 | 9.903 | 0.003 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 1.401 | 0.247 | ||
| Systolic blood presurre | Face mask condition | 3 | 1.021 | 0.387 | |
| Cardiorespiartory fitness | 1 | 9.117 | 0.005 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 1.171 | 0.326 | ||
| Diastolic blood presurre | Face mask condition | 3 | 0.321 | 0.810 | |
| Cardiorespiartory fitness | 1 | 0.518 | 0.477 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.522 | 0.669 | ||
| Breathing frequency | Face mask condition | 3 | 3.417 | 0.020 | |
| Cardiorespiartory fitness | 1 | 0.647 | 0.426 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 3.690 | 0.014 | ||
| Perceived respiratory effort | Face mask condition | 3 | 0.431 | 0.731 | |
| Cardiorespiartory fitness | 1 | 1.446 | 0.237 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.943 | 0.423 | ||
| Perceived physical exertion | Face mask condition | 3 | 0.221 | 0.882 | |
| Cardiorespiartory fitness | 1 | 0.625 | 0.434 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.495 | 0.687 | ||
| 5 | PWC150 | Face mask condition | 3 | 1.703 | 0.173 |
| Cardiorespiartory fitness | 1 | 14.001 | 0.001 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 2.215 | 0.93 | ||
| SpO2 | Face mask condition | 3 | 0.191 | 0.902 | |
| Cardiorespiartory fitness | 1 | 7.738 | 0.01 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.309 | 0.819 | ||
| tcPCO2 | Face mask condition | 3 | 3.133 | 0.032 | |
| Cardiorespiartory fitness | 1 | 1.649 | 0.21 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.883 | 0.455 | ||
| Systolic blood presurre | Face mask condition | 3 | 0.881 | 0.456 | |
| Cardiorespiartory fitness | 1 | 8.535 | 0.007 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.402 | 0.752 | ||
| Diastolic blood presurre | Face mask condition | 3 | 0.17 | 0.916 | |
| Cardiorespiartory fitness | 1 | 1.259 | 0.273 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.711 | 0.549 | ||
| Breathing frequency | Face mask condition | 3 | 1.432 | 0.239 | |
| Cardiorespiartory fitness | 1 | 1.409 | 0.244 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 2.522 | 0.063 | ||
| Perceived respiratory effort | Face mask condition | 3 | 17.911 | <0.001 | |
| Cardiorespiartory fitness | 1 | 4.702 | 0.037 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 2.843 | 0.043 | ||
| Perceived physical exertion at PWC150 | Face mask condition | 3 | 1.299 | 0.28 | |
| Cardiorespiartory fitness | 1 | 8.223 | 0.007 | ||
| Face mask condition × cardiorespiratory fitness | 3 | 0.634 | 0.595 |
Bonferroni corrected alpha level is 0.003. No statistically significant interactions of face mask condition with cardiorespiratory fitness level appeared.