Comparison of peak XXXX consumption during cycle and treadmill exercise in severe @entity1030 .

@entity1 @entity26 @entity880 @entity1030
BACKGROUND: In normal subjects treadmill exercise usually produces the greatest maximal @entity26 consumption (VO2max). This may not be true for @entity1 with severe @entity1030 ( @entity1030 ) in whom bicycle exercise, which offers support for the shoulder girdle, may produce a higher @entity26 consumption than treadmill exercise. The aim of this study was to determine which mode of exercise produced the greatest @entity26 consumption in @entity1 with severe @entity1030 . METHODS: Eight @entity1 with severe @entity1030 (forced expiratory volume in one second (FEV1) more than three standardised residuals below predicted) exercised to a symptom limited maximum on a bicycle and on a treadmill on separate days. The workload on the bicycle wa increased by 10 watts each minute, and the treadmill gradient was increased by 2.5% alternate minutes whilst the speed remained constant. Measurements of @entity26 consumption (VO2), ventilation (VE), heart rate, and @entity26 saturation were made, and capillary blood gases were measured before and immediately after exercise. @entity880 concentration was measured before and four minutes after exercise. RESULTS: There were no differences at peak exercise between the two forms of exercise for VO2 (median 11.7 and 12.2 ml/min/kg for bicycle and treadmill, respectively), for VE (median 26.6 and 25.0 l/min, respectively), and for heart rate (median 119 and 115 beats/min, respectively). The median @entity880 levels after bicycle exercise were higher than those after the treadmill (2.42 v 0.94 mmol/l). CONCLUSIONS: Although only a small number of @entity1 was studied and individual variability was large, there was no clear difference between the two forms of exercise. Regular bicycle exercise was unfamiliar to this group of @entity1 and generated the greatest @entity880 response. The results do not support the hypothesis that bicycle exercise will produce a better performance in @entity1 with severe @entity1030 , but the two modes of exercise cannot be used interchangeably.
