Table 3.
Differences in total exercise time, VO2, VE, and power output at VT1 and VT2, and peak intensities between experimental groups
| HG | COVIDG | COPDG | IHDG | P value | |
|---|---|---|---|---|---|
| Total exercise time (min:s) | 11:20 a (10:14–12:25) | 8:14 (7:01–9:28) | 7:22 (6:25–8:20) | 9:04 (7:36–10:32) | <0.001 |
| VO2peak (mL·kg−1·min−1) | 32.31 a (28.32–36.31) | 17.30 (14.82–19.78) | 14.35 (12.97–15.73) | 18.82 (15.64–22) | <0.001 |
| VE (L·min−1) | 83.35 a (67.33–99.36) | 55.05 (45.94–64.15) | 38.19 (33.11–43.28) | 58.79 c (49.09–68.50) | <0.001 |
| Peak power (W) | 215.60 a (181.84–249.37) | 89.67 (69.74–109.60) | 74.67 (62.79–86.54) | 130.93 c (102.25–159.62) | <0.001 |
| VO2 at VT1 (mL·kg−1·min−1) | 14.40 a (12.33–16.47) | 8.94 (7.89–9.99) | 9.25 (8.19–10.30) | 10.58 (9.03–12.13) | <0.001 |
| VE at VT1 (L·min−1) | 24.75 (19.81–29.70) | 21.42 (17.61–25.19) | 21.57 (18.73–24.42) | 24.54 (20.84–28.24) | 0.394 |
| Power at VT1 (W) | 84.47 a (68.74–100.19) | 29.67 (17.51–41.83) | 28.20 (15.39–41.01) | 61.60 b (45.73–77.47) | <0.001 |
| VO2 at VT2 (mL·kg−1·min−1) | 25.18 a (21.78–28.58) | 12.80 (11.34–14.26) | 12.14 (10.56–13.72) | 14.83 (12.53–17.13) | <0.001 |
| VE at VT2 (L·min−1) | 53.21 a (42.02–64.41) | 35.81 (29.71–41.92) | 29.92 (25.11–34.72) | 39.08 (33.11–45.04) | <0.001 |
| Power at VT2 (W) | 176.53 a (147.48–205.58) | 69.20 (52.53–85.87) | 62.21 (49.36–75.04) | 108.41 b (87.11–129.69) | <0.001 |
COPDG, chronic obstructive pulmonary disease group; COVIDG, COVID‐19 group; HG, healthy group; IHDG, ischaemic heart disease group; VE, minute ventilation; VO2, oxygen uptake; VT1, first ventilatory threshold; VT2, second ventilatory threshold.
Data are provided as mean and 95% confidence intervals (95% CIs).
a
Significantly different from COVIDG, COPDG, and IHDG (P < 0.05).
b
Significantly different from COVIDG and COPDG at VT1 and VT2 intensities (P < 0.05).
c
Significantly different from COPDG (P < 0.05).