Table 2

Background characteristics, lung function and selected peak cardiopulmonary exercise variables

VariablesMales
N=14
Mean (SD)
Females
N=15
Mean (SD)
Age, years27.6 (6.4)22.8 (6.8)
Height, cm182.2 (6.6)167.0 (4.5)
Weight, kg77.7 (9.6)58.4 (5.5)
BMI23.4 (2.2)20.9 (2.0)
FVC, z-score0.86 (0.81)0.24 (0.75)
FEV1, z-score0.26 (0.88)−0.16 (0.48)
Peak respiratory rate, breaths/min56 (9.2)51 (8.7)
Peak heart rate, beats/min183 (8.8)185 (0.5)
Peak RER, units1.19 (0.06)1.21 (0.04)
Running distance, m1258 (179.7)1058 (114.0)
Running time, min14.2 (1.2)12.8 (0.8)
Peak VO2, mL/kg/min58.9 (5.9)52.0 (4.1)
Peak VE, L/min173.9 (12.2)107.8 (11.1)
Peak breathing reserve, %−5 (11.7)8 (10.0)
Speed at peak VO2, m/s2.54 (0.22)2.30 (0.12)
  • Breathing reserve is the percentage difference between maximal voluntary ventilation (FEV1×35) and peak minute ventilation.

  • BMI, body mass index; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; RER, respiratory exchange ratio; VE, minute ventilation; VO2, oxygen consumption.