Table 4. Respiratory, metabolic and perceptual responses during exercise in the CR_F trial at exhaustion, in the CR trial at the iso-time point, and in the CR trial at exhaustion (=9). Data are means (±SD).
|
CR_F Trial at Exhaustion |
CR Trial at Iso-time Point |
CR Trial at Exhaustion |
VE (l·min-1) |
123.9 (14.2) |
120.2 (14.7) |
127.3 (16.0) |
VT (l) |
2.01 (.42 |
2.07 (.42) |
2.06 (.42) |
fb (breath·min-1) |
63.8 (12.0 |
60.3 (13.4) |
64.2 (13.2) |
Ti/Ttot (%) |
51.0 (2.9 |
50.0 (3.8) |
50.3 (3.2) |
VO2 (ml·kg-1·min-1) |
58.2 (5.8 |
58.3 (5.8) |
59.6 (4.1) |
HR (beats·min-1) |
177.4 (6.8) * |
179.2 (7.9) * |
182.6 (7.6) |
RPB |
8.7 (1.4) |
6.9 (1.4) * |
9.1 (.8) |
RPE |
18.9 (1.3) |
16.6 (1.8) *† |
18.8 (1.2) |
* Significantly different from the CR trial at exhaustion (p < 0.05).† Significantly different from the CR_F trial at exhaustion (p < 0.05).V, minute ventilation; V, tidal volume; f, breathing frequency; T/T, duty cycle; VO, oxygen consumption; HR, heart rate; RPB, rating of perceived breathlessness; RPE, rating of perceived exertion.