Skip to main content

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%).
Back to article page

Extreme Physiology & Medicine

ISSN: 2046-7648

Contact us