de Groot S, Dallmeijer A J, van Asbeck F W A, Post M W M, Bussmann J B J, van der Woude L
DNO, Rehabilitation Center Amsterdam, Amsterdam, Netherlands.
Int J Sports Med. 2007 Oct;28(10):880-6. doi: 10.1055/s-2007-964900. Epub 2007 Apr 13.
The purpose of the present study was to investigate whether mechanical efficiency (ME) relates to wheelchair propulsion capacity and wheelchair performance tasks during and after rehabilitation of people with a spinal cord injury (SCI). Eighty participants with a SCI were tested during rehabilitation (3 x) and 1 year after discharge. Two 3-minute submaximal exercise blocks, a maximal wheelchair exercise test, and four wheelchair performance tasks were performed. ME, peak power output (PO (peak)), the sum of the performance times of a 15-m sprint and figure-of-eight, and the heart rate reserve (%HRR) during 10 s of wheelchair propulsion on a 3 % and 6 % slope were calculated. The relationship between ME and PO (peak), %HRR and performance time was tested with a multilevel regression analysis. ME showed a significant relationship with PO (peak) (p </= 0.002). A 1 % higher ME related to a 1.6 - 2.2 W higher PO (peak). ME of exercise block 2 was related to the sum of the performance times of a 15-m sprint and figure-of-eight; the tests were performed faster by participants with a higher ME. No relationship was found between ME and %HRR during wheelchair propulsion on a slope. ME showed a significant effect on wheelchair propulsion capacity and wheelchair performance time during and 1 yr after SCI rehabilitation although the isolated effect of ME is small.
本研究的目的是调查脊髓损伤（SCI）患者在康复期间及康复后，机械效率（ME）是否与轮椅推进能力及轮椅性能任务相关。80名SCI患者在康复期间（3次）及出院后1年接受了测试。进行了两个3分钟的次最大运动组、一次最大轮椅运动测试以及四项轮椅性能任务。计算了ME、峰值功率输出（PO(peak)）、15米短跑和“8”字形行驶性能时间总和，以及在3%和6%坡度的轮椅推进10秒期间的心率储备（%HRR）。通过多级回归分析测试了ME与PO(peak)、%HRR和性能时间之间的关系。ME与PO(peak)显示出显著关系（p≤0.002）。ME每提高1%，PO(peak)就高出1.6 - 2.2瓦。运动组2的ME与15米短跑和“8”字形行驶性能时间总和相关；ME较高的参与者完成测试的速度更快。在斜坡上进行轮椅推进时，未发现ME与%HRR之间存在关系。尽管ME的单独影响较小，但ME对SCI康复期间及康复后1年的轮椅推进能力和轮椅性能时间有显著影响。
