Table 3.
Mean values of all assessed outcome parameters during the four experimental conditions.
| Outcome Parameter | No Mask | MedMask | FFP2exhal | Community Mask | ||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| PWC130 (W/kg) | 1.91 | 0.70 | 1.84 | 0.72 | 1.74 | 0.65 | 1.83 | 0.70 |
| PWC150 (W/kg) | 2.35 | 0.83 | 2.32 | 0.81 | 2.28 | 0.76 | 2.35 | 0.89 |
| tcpCO2 at PWC130 (mmHg) | 32.37 | 6.22 | 34.07 | 4.28 | 33.64 | 4.29 | 33.70 | 4.48 |
| tcpCO2 at PWC150 (mmHg) | 31.18 | 6.15 | 34.33 | 4.70 | 33.45 | 4.54 | 32.78 | 4.29 |
| SpO2 at PWC 130 (%) | 97.30 | 3.74 | 97.42 | 3.38 | 98.29 | 2.94 | 97.90 | 4.03 |
| SpO2 at PWC 150 (%) | 97.45 | 4.84 | 98.11 | 3.02 | 98.66 | 2.17 | 98.18 | 2.71 |
| Systolic blood pressure at PWC130 (mmHg) | 151.00 | 28.67 | 149.34 | 29.18 | 152.38 | 29.30 | 150.79 | 25.75 |
| Systolic blood pressure at PWC150 (mmHg) | 157.45 | 28.28 | 160.80 | 28.54 | 155.11 | 24.18 | 152.51 | 24.34 |
| Dyastolic blood pressure at PWC130 (mmHg) | 75.19 | 13.81 | 74.76 | 14.37 | 76.13 | 15.84 | 74.32 | 10.57 |
| Dyastolic blood pressure PWC150 (mmHg) | 78.61 | 14.48 | 77.88 | 14.15 | 77.02 | 12.24 | 79.22 | 11.68 |
| Breathing frequency at PWC130 (1/min) | 22.34 | 5.79 | 21.60 | 4.59 | 21.76 | 10.97 | 21.38 | 4.53 |
| Breathing frequency at PWC150 (1/min) | 24.15 | 6.64 | 23.09 | 4.74 | 22.26 | 4.87 | 23.00 | 4.67 |
| Perceived respiratory effort at PWC130 (0–10) | 3.19 | 1.52 | 3.89 | 1.70 | 4.30 | 1.92 | 3.96 | 1.59 |
| Perceived respiratory effort at PWC150 (0–10) | 3.97 | 1.71 | 5.12 | 1.92 | 5.34 | 1.95 | 5.12 | 1.83 |
| Perceived physical exertion at PWC130 (0–10) | 3.51 | 1.25 | 3.80 | 1.67 | 3.59 | 1.83 | 3.42 | 1.39 |
| Perceived physical exertion at PWC150 (0–10) | 4.47 | 1.35 | 4.87 | 1.70 | 4.59 | 1.83 | 4.51 | 1.66 |
Bold and grey shaded numbers indicate statistically significant differences in comparison to the no mask condition (Bonferroni corrected p < 0.003). tcpCO2, transcutaneous carbon dioxide partial pressure; SpO2, saturation of peripheral capillary oxygen; PWC, physical working capacity; MedMask, medical face mask; FFP2exhal, filtering facepiece with exhalation valve.