Table 1—

Physical characteristics, pulmonary function and exercise capacities of patients at the outset of the study

Interval groupContinuous group
males/females n14/416/2
Age yrs67±269±2
Weight kg77±376±3
Height cm166±2167±2
FEV1 L1.16±0.091.13±0.09
    % pred45.4±3.944.4±3.6
FVC L2.24±0.132.17±0.11
    % pred64.7±4.865.6±3.8
DL,CO % pred58.3±5.652.2±5.1
Pa,O2 mmHg71±271±2
Pa,CO2 mmHg40±241 ± 1
Arterial pH7.41±0.067.43±0.02
Peak work-rate W57±657±5
Peak VO2 L·min−11.06±0.061.09±0.06
    % pred54.8±3.455.7±3.5
Peak VE L·min−135.8±2.536.4±2.7
LT L·min−10.81±0.050.78±0.04
Peak fc, beats·min−1128±4122±4
Peak Sp,O2 %94±192±1
  • Data are presented as mean±sem

  • FEV1: forced expiratory volume in one second

  • FVC: forced vital capacity

  • DL,CO: diffusion capacity of the lung for carbon monoxide

  • Pa,O2: arterial oxygen tension

  • Pa,CO2: arterial carbon dioxide tension

  • VO2: oxygen uptake

  • VE: minute ventilation

  • LT: lactate threshold

  • fC: Cardiac frequency

  • Sp,O2: arterial oxygen saturation measured by pulse oximetry

  • % pred: percentage of the predicted value. (1 mmHg=0.133 kPa; 1 kPa=7.5 mmHg.).