Biomechanics Laboratory, MAX Mobility, LLC, Antioch, TN 37013, USA.
Spinal Cord. 2011 Mar;49(3):457-62. doi: 10.1038/sc.2010.149. Epub 2010 Nov 2.
Cross-sectional study.
To compare handrim biomechanics recorded during overground propulsion with those recorded during propulsion on a motor-driven treadmill.
Biomechanics laboratory.
In all, 28 manual wheelchair users propelled their own wheelchairs, at a self-selected speed, on a low-pile carpet and on a wheelchair accessible treadmill. Handrim biomechanics were recorded with an OptiPush instrumented wheelchair wheel.
Across the two conditions, all handrim biomechanics were found to be similar and highly correlated (r>0.85). Contact angle, peak force, average force and peak axle moment differed by 1.6% or less across the two conditions. Although not significant, power output and cadence tended to be slightly higher for the treadmill condition (3.5 and 3.6%, respectively), owing to limitations in adjusting the treadmill grade.
Based on the results of this study, a motor-driven treadmill can serve as a valid surrogate for overground studies of wheelchair propulsion.
横断面研究。
比较地面推进和电动跑步机推进时记录的手轮生物力学。
生物力学实验室。
共有 28 名手动轮椅使用者以自选速度在低绒地毯和轮椅无障碍跑步机上推进自己的轮椅。手轮生物力学使用 OptiPush 仪器化轮椅轮记录。
在两种情况下，所有手轮生物力学均相似且高度相关（r＞0.85）。接触角、峰值力、平均力和峰值轴力矩在两种情况下的差异均小于 1.6%。虽然不显著，但由于跑步机坡度调整受限，跑步机条件下的功率输出和步频趋于略高（分别为 3.5%和 3.6%）。
根据这项研究的结果，电动跑步机可以作为地面轮椅推进研究的有效替代方法。
