Glaser R M, Sawka M N, Laubach L L, Suryaprasad A G
J Appl Physiol Respir Environ Exerc Physiol. 1979 Jun;46(6):1066-70. doi: 10.1152/jappl.1979.46.6.1066.
To evaluate wheelchair activity in reference to a more familiar mode of locomotion, metabolic and cardiopulmonary responses to wheelchair ergometer (WERG) and bicycle ergometer (BERG) exercise were compared. Eighteen able-bodies subjects were tested on a combination wheelchair-bicycle ergometer. Oxygen uptake (VO2), respiratory exchange ratio (R), pulmonary ventilation (VE), ventilatory equivalent (VE/VO2), percent net mechanical efficiency (ME), and heart rate (HR) were determined at power output (PO) levels of 30, 90, and 150 kpm/min on each ergometer. For WERG and BERG exercise, VO2, VE, and HR increased linearly with PO. Generally, VO2, R, VE, VE/VO2, and HR responses were higher (P less than 0.05) during WERG than BERG exercise at each PO. Blood lactate was determined after 150 kpm/min, and found to be higher (P less than 0.05) during WERG than BERG exercise. ME increased with PO and was lower (P less than 0.05) for WERG than BERG exercise at each PO level. The greater metabolic and cardiopulmonary responses observed during WERG exercise may be due to inefficient biomechanics and the relatively small upper body musculature used for propulsion.
为了参照更为熟悉的运动方式来评估轮椅活动情况，对轮椅测力计（WERG）和自行车测力计（BERG）运动的代谢及心肺反应进行了比较。18名身体健全的受试者在轮椅 - 自行车联合测力计上接受测试。在每个测力计上，分别于功率输出（PO）水平为30、90和150千帕米/分钟时测定摄氧量（VO2）、呼吸交换率（R）、肺通气量（VE）、通气当量（VE/VO2）、净机械效率百分比（ME）以及心率（HR）。对于WERG和BERG运动，VO2、VE和HR均随PO呈线性增加。一般而言，在每个PO水平下，WERG运动期间的VO2、R、VE、VE/VO2和HR反应均高于BERG运动（P小于0.05）。在150千帕米/分钟运动后测定血乳酸，发现WERG运动期间的血乳酸水平高于BERG运动（P小于0.05）。ME随PO增加，且在每个PO水平下，WERG运动的ME均低于BERG运动（P小于0.05）。WERG运动期间观察到的更大的代谢及心肺反应可能是由于生物力学效率低下以及用于推进的上身肌肉相对较少所致。
