van Drongelen S, Maas J C, Scheel-Sailer A, Van Der Woude L H V
Swiss Paraplegic Research, Nottwil, Switzerland.
J Med Eng Technol. 2009;33(2):151-7. doi: 10.1080/13561820802565676.
To evaluate the effect of the spatial orientation of the crank axis on mechanical efficiency, physiological strain and perceived discomfort in submaximal synchronous arm crank ergometry.
Twelve able-bodied individuals performed 12 submaximal exercise bouts of 3 minutes (women: 20 W/25 W; men: 25 W/35 W). The crank axis position was defined by elbow and shoulder angle.
The results showed that a crank set-up with an elbow angle of 30 degrees was more efficient than 15 degrees ; oxygen consumption and minute ventilation were significantly lower. No significant effects were seen for shoulder angle. Power output and gender showed obvious effects.
The magnitude of this effect and the absence of any significant shoulder angle effects may be due to the relative low exertion levels that were evaluated. An elbow angle of 30 degrees flexion in arm crank exercise is favourable compared to an elbow angle of 15 degrees in able-bodied untrained subjects.
评估在次最大强度同步手臂曲柄测力计测试中，曲柄轴的空间方向对机械效率、生理应变和感知不适的影响。
12名身体健康的个体进行了12次持续3分钟的次最大强度运动（女性：20瓦/25瓦；男性：25瓦/35瓦）。曲柄轴位置由肘部和肩部角度确定。
结果表明，肘部角度为30度的曲柄设置比15度更有效；耗氧量和分钟通气量显著更低。肩部角度未显示出显著影响。功率输出和性别显示出明显影响。
这种影响的程度以及肩部角度无任何显著影响可能是由于所评估的相对较低的运动强度。在身体健康的未经训练的受试者中，手臂曲柄运动时肘部弯曲30度的角度比15度更有利。
