Reid M, Lawrie A T, Hunter J, Warren P M
Rayne Laboratory, Department of Medicine (RIE), Scotland, U.K.
Scand J Rehabil Med. 1990;22(3):139-43.
Previous studies of the energy cost of wheelchair propulsion have used ergometers or tracks requiring little steering. We have measured minute ventilation (VE), oxygen consumption (VO2), carbon dioxide output (VCO2) and heart rate (HR) during exercise in a two arm, hand-rim propulsion wheelchair on a treadmill, and on three tracks of increasing tortuosity in eight able-bodied subjects. During propulsion at 0.6 m/sec, VE, VO2, and VCO2 were significantly greater on the track with the maximal steering component than on that with the minimal steering component, or on the treadmill with no steering component. Heart rate was significantly higher on the maximal compared to minimal steering component track. Exercise at speeds varying from 0.2 to 1.0 m/sec showed that VO2 and VCO2 were significantly higher on the medium steering component track than on the treadmill at speeds of 0.6 m/sec and above. We conclude that the effort of steering contributes significantly to the energy cost of wheelchair propulsion particularly at higher speeds.
以往关于轮椅推进能量消耗的研究使用的是测力计或转向要求较低的跑道。我们在跑步机上对八名身体健全的受试者，在双臂手摇轮圈推进式轮椅上，以及在三条曲折度逐渐增加的跑道上进行运动时，测量了每分通气量（VE）、耗氧量（VO2）、二氧化碳排出量（VCO2）和心率（HR）。在以0.6米/秒的速度推进时，与转向成分最小的跑道或无转向成分的跑步机相比，转向成分最大的跑道上的VE、VO2和VCO2显著更高。与转向成分最小的跑道相比，转向成分最大的跑道上的心率显著更高。在0.2至1.0米/秒的不同速度下进行运动表明，在0.6米/秒及以上的速度时，中等转向成分跑道上的VO2和VCO2显著高于跑步机上的。我们得出结论，转向的努力对轮椅推进的能量消耗有显著贡献，尤其是在较高速度时。
