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Table 4 Breathing pattern, lung mechanics and gas exchange responses to exercise (n = 32)

From: Influence of resting lung diffusion on exercise capacity in patients with COPD

 

Rest

First work load

Peak exercise

Heart Rate (bpm)

77 ± 10

92 ± 11

103 ± 22

RPE (6–20)

7 ± 2

11 ± 2

17 ± 2

Dyspnea (0-10)

1 ± 1

3 ± 2

7 ± 2

VE (L/min)

12.5 ± 2.7

24 ± 6

34 ± 11

Fb/VT ratio

26 ± 15

26 ± 14

30 ± 13

TI/TTOT ratio

39 ± 8

38 ± 4

39 ± 4

IC (L)

2.2 ± 0.7

1.9 ± 0.7

1.8 ± 0.7

VT/IC (%)

37 ± 13

52 ± 12

65 ± 27

VO2 ml/kg/min

3.7 ± 0.8

8.3 ± 1.4

11.4 ± 3.1

VE/VCO2 ratio

47 ± 7

37 ± 5

36 ± 5

PetCO2 mmHg

35 ± 5

37 ± 4

37 ± 5

O2Pulse

4 ± 1

8 ± 2

9 ± 3

SaO2 (%)

96 ± 2

95 ± 3

94 ± 3

  1. VE Minute ventilation, fb breathing frequency, VT tidal volume, TI inspiratory time, TTOT total respiratory cycle time, IC inspiratory capacity, VO 2 oxygen consumption, VCO 2 carbon dioxide production, PetCO 2 end tidal partial pressure of carbon dioxide, O 2 pulse VO2/heart rate, SaO 2 arterial oxygen saturation estimated from pulse oximetry
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BMC Pulmonary Medicine

ISSN: 1471-2466

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