Table 2.
Running speed, ventilatory, and perceptual data at baseline
| Variable | LC | UL | P‐value | %Δ | 95% CI |
|---|---|---|---|---|---|
| Running Speed (km·hr−1) | 9.5 (1.1)a | 11.4 (1.4) | <0.001 | 16.6 | −2.3 to −1.5 |
| At 8th minute of exercise | |||||
| O2 (L·min−1) | 3.12 (0.38) | 3.12 (0.37) | 0.953 | – | −0.06 to +0.06 |
| E (L·min−1) | 88.3 (14.2)a | 82.9 (12.7) | 0.004 | 6.1 | +2.1 to +8.7 |
| V T (L·breath−1) | 2.01 (0.4) | 2.20 (0.4) | 0.112 | – | −0.43 to +0.05 |
| f b (breaths·min−1) | 45 (5.5)a | 39 (7.9) | 0.029 | 13.0 | +0.7 to +10.8 |
| EFL (%) | 26.4 (31.3) | 18.2 (23.2) | 0.239 | – | −6.3 to +22.8 |
| IRV (L) | 1.4 (0.6) | 1.5 (0.5) | 0.727 | – | −0.3 to +0.2 |
| (% FVC) | 27.2 (9.0) | 28.1 (8.7) | – | – | – |
| ERV (L) | 1.0 (0.5)a | 1.3 (0.7) | 0.033 | −25.9 | −0.6 to −0.03 |
| (% FVC) | 18.0 (8.3) | 24.4 (12.1) | – | – | – |
| Ti/TTotal (%) | 51.4 (2.9) | 49.8 (3.7) | 0.084 | – | −0.3 to +3.5 |
| RPE | 13.2 (2.4)a | 11.6 (2.5) | 0.002 | 12.0 | +0.7 to +2.5 |
| Dyspnea | 4.3 (1.6)a | 3.4 (1.6) | 0.014 | 21.2 | +0.2 to +1.6 |
| At end‐exercise (T lim) | |||||
| RPE | 15.8 (2.1) | 15.3 (2.3) | 0.096 | – | −0.1 to +0.9 |
| Dyspnea | 5.9 (1.6) | 5.5 (1.8) | 0.096 | – | −0.1 to +0.9 |
O2, absolute oxygen consumption; E, minute ventilation; V T, tidal volume; f b, breathing frequency; EFL, expiratory flow limitation; IRV, inspiratory reserve volume; ERV, expiratory reserve volume; Ti/TTotal, inspiratory duty cycle; RPE, ratings of perceived exertion.
a
Significantly different from UL, P < 0.05. Data are given as mean(SD).