The effects of added prosthetic mass on physiologic responses and stride frequency during multiple speeds of walking in persons with transtibial amputation
The effects of added prosthetic mass on physiologic responses and stride frequency during multiple speeds of walking in persons with transtibial amputation
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DOI：
10.1016/j.apmr.2003.03.006
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发表时间：
2003-12-01
影响因子：
4.3
通讯作者：
Shurr, DG
中科院分区：
文献类型：
--
作者：
Lin-Chan, SJ;Nielsen, DH;Shurr, DG
目的：探讨3种假体质量条件对胫骨截肢者在多速度跑台行走时选择的生理反应的影响。设计：3种假体质量条件和5种步行速度的重复测量设计。地点：大学研究实验室。参与者：8名单侧创伤性经胫骨截肢患者。干预：3种假体质量条件分别占膝关节以下完整肢体质量的60%、80%和100%。根据随机分配的质量条件，在仪表式跑步机上进行多速度跑步机步行试验(每种速度分别为54、67、80、94、107m/min，4min)。主要观察指标：氧耗量、步态效率、相对运动强度(占年龄预测最大心率的百分比)和步频。结果：假体质量对氧耗量和步态效率没有显著影响(P>；0.05)。从60%到100%假体质量条件下，相对运动强度显著增加，步频显著降低(P
Objectives: To determine the effect of 3 prosthetic mass conditions on selected physiologic responses during multiple speed treadmill walking in persons with transtibial amputation.Design: A repeated-measures design for 3 prosthetic mass conditions and 5 walking speeds.Setting: University research laboratory.Participants: Eight ambulatory men with unilateral traumatic transtibial amputation.Interventions: The 3 prosthetic mass conditions were 60%, 80%, and 100% of the estimated intact limb below-knee mass. The multiple-speed treadmill walking test (4min at each speed: 54, 67, 80, 94, 107 m/min) was performed on an instrumented treadmill according to randomly assigned mass conditions.Main Outcome Measures: Oxygen consumption, gait efficiency, relative exercise intensity (percentage of age-predicted maximal heart rate), and stride frequency.Results: Prosthetic mass did not significantly alter oxygen consumption or gait efficiency (P>.05). From the 60% to the 100% prosthetic mass conditions, relative exercise intensity significantly increased and stride frequency significantly decreased (P