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Table 2 Ventilatory, cardiovascular, and perceptual responses in a HH group and NH group at SL and in HYP

From: Cycling performance decrement is greater in hypobaric versus normobaric hypoxia

Group Condition % peak Work rate (W) VE(BTPS) (l · min -1) VO 2(l · min -1) VE · VO 2 -1 VE · VCO 2 -1 SaO 2(%) HR (bpm) CO (l · min -1) MAP (mmHg) RPE
HH (n = 6) SL 45 110 ± 8 43 ± 7 1.55 ± 0.10 27.7 ± 5.0 33.3 ± 5.0 98 ± 1 126 ± 11 14.9 ± 2.5 105 ± 9 8 ± 2
65 157 ± 14 67 ± 9 2.13 ± 0.13 31.2 ± 4.3 37.2 ± 4.3 97 ± 1 159 ± 13 17.5 ± 2.1 108 ± 11 11 ± 3
HYP 45 73 ± 8* 39 ± 11 1.11 ± 0.12* 35.2 ± 3.4* 35.7 ± 3.4 74 ± 5* 126 ± 13 13.9 ± 1.3 109 ± 14 8 ± 2
65 110 ± 8* 61 ± 5 1.53 ± 0.12* 40.2 ± 2.5* 39.8 ± 2.5* 75 ± 3* 149 ± 11 16.1 ± 2.1 115 ± 24 11 ± 3
NH (n = 6) SL 45 116 ± 23 44 ± 9 1.57 ± 0.26 29.4 ± 3.0 29.6 ± 3.0 98 ± 1 130 ± 19 13.1 ± 2.5 115 ± 9 9 ± 2
65 162 ± 24 67 ± 17 2.03 ± 0.39 33.2 ± 4.7 33.1 ± 4.7 97 ± 1 156 ± 17 14.7 ± 2.6 113 ± 12 13 ± 2
HYP 45 68 ± 24* 37 ± 7 1.18 ± 0.25* 30.6 ± 3.3 33.6 ± 3.3* 74 ± 6* 121 ± 15 12.8 ± 1.7 109 ± 7 10 ± 2
65 116 ± 24* 61 ± 13 1.66 ± 0.36* 36.5 ± 3.0* 38.4 ± 3.0* 75 ± 4* 148 ± 13 15.6 ± 2.7 117 ± 11 12 ± 3
  1. Mean ± SD; *P < 0.05 from SL at same relative work rate within groups; P < 0.05 between groups at same relative work rate. SL sea level, HYP hypoxia, VE, BTPS minute ventilation, VO 2 oxygen uptake, VE · VO 2 -1 ventilatory equivalent for oxygen, VE · VCO 2 -1 ventilatory equivalent for carbon dioxide, SaO 2 arterial oxygen saturation, HR heart rate, CO cardiac output, MAP mean arterial pressure, RPE rating of perceived exertion; 45% of altitude-specific VO2peak (45%), 65% of altitude-specific VO2peak (65%).