Table 2

Cardiopulmonary exercise test results, showing measures of exercise intensity and outcome of exercise performance

Cardiopulmonary exercise data
(Mean±SD)
Total group
n=70
Group A
n=33
Group B
n=37
Comparison of group A and B
Heart rate at peak % predicted88.2 (7.8)89.1 (8.3)87.1 (7.3)0.61
Respiratory rate at peak (B/min)40.4 (8.6)43.0 (7.1)38.0 (9.2)0.015
Respiratory exchange ratio;
(comparison with Ref 1.23±SD 0.09 Edvardson)
1.27 (0.12)
p 0.005
1.26 (0.13)
0.19
1.27 (0.12)
0.0075
0.25
∆ pH (peak – rest)−0.12 (0.047)−0.14 (0.048)−0.11 (0.043)0.014
∆ HCO3 (peak – rest)−7.1 (2.5)−8.0 (2.6)−6.2 (2.2)0.003
∆ lactate8.4 (2.8)9.7 (2.7)7.4 (2.4)0.002
VO2 max, % predicted78.0 (13.7)89.6 (7.8)67.7 (8.6)<0.0001
Work, % predicted87.9 (14.2)97.7 (10.1)79.2 (11.3)<0.0001
VO2/work9.51 (1.3)10.03 (0.16)9.04 (0.23)0.0012
AT, % predicted43.5 (10.0)49.7 (9.1)38.1 (7.8)<0.0001
O2 pulse, % predicted88.9 (16.3)101.8 (11.7)77.4 (9.8)<0.0001
BR%49.9 (13.2)44.2 (10.8)54.9 (13.1)0.0002
  • Comparison of groups A and D using Student’s t-test and χ2 test (Reference Data from Wasserman et al.,22 Edvardson et al25).

  • AT, anaerobic threshold; BR, breathing reserve.