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Table 1 Cardiorespiratory variables during the 5-min exercise

From: Does voluntary hypoventilation during exercise impact EMG activity?

Variables

Conditions

1 min

2 min

3 min

4 min

5 min

\({\dot{\text{V}}}\)E (L/min)

NB

50.34 ± 3.60

61.60 ± 4.63

69.52 ± 5.30

69.52 ± 5.30

68.46 ± 3.97

VH

36.14 ± 4.78*

45.27 ± 2.03*

50.58 ± 4.87*

52.52 ± 4.77*

53.60 ± 5.11*

\({\dot{\text{V}}}\)O2 (L/min)

NB

1.93 ± 0.12

2.22 ± 0.11

2.38 ± 0.07

2.41 ± 0.06

2.46 ± 0.05

VH

1.66 ± 0.14

2.03 ± 0.14

2.20 ± 0.14

2.23 ± 0.23

2.34 ± 0.15

\({\dot{\text{V}}}\)CO2 (L/min)

NB

1.55 ± 0.10

1.88 ± 0.13

2.05 ± 0.14

2.12 ± 0.15

2.08 ± 0.10

VH

1.24 ± 0.11*

1.69 ± 0.09*

1.83 ± 0.20

1.90 ± 0.20

2.00 ± 0.14

RER

NB

0.81 ± 0.04

0.85 ± 0.04

0.86 ± 0.05

0.88 ± 0.07

0.85 ± 0.04

VH

0.75 ± 0.02

0.80 ± 0.03

0.83 ± 0.04

0.85 ± 0.03

0.85 ± 0.02

HR (beats/min)

NB

127 ± 7

136 ± 6

142 ± 8

145 ± 7

147 ± 9

VH

128 ± 6

136 ± 7

142 ± 7

147 ± 7

150 ± 7

SaO2 (%)

NB

98.4 ± 0.7

98.0 ± 0.9

97.5 ± 0.7

97.5 ± 0.5

97.4 ± 0.7

VH

97.2 ± 1.5*

93.2 ± 3.4*

92.3 ± 2.5*

91.2 ± 2.1*

89.6 ± 3.2*

  1. Values are mean ± SD. * P < 0.05 vs. NB condition