Effect of speed on kinematic, kinetic, electromyographic and energetic reference values during treadmill walking
Effect of speed on kinematic, kinetic, electromyographic and energetic reference values during treadmill walking
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DOI：
10.1016/j.neucli.2008.02.002
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发表时间：
2008-04-01
影响因子：
3
通讯作者：
Lejeune, T.
中科院分区：
文献类型：
--
作者：
Stoquart, G.;Detrembleur, C.;Lejeune, T.
目标。-在水平上评估正常和病理步态。地面有一些缺点，可以通过在跑步机上行走来克服。目前的工作旨在评估在跑步机上扩展步态分析的可行性，允许以恒定速度记录年轻健康受试者的多步。同时也提供了特定速度的运动学、肌电图和能量参考值。12名健康的志愿者（23岁，2岁）以6种速度（1-6公里/小时）在测力跑步机上行走。分析了髋关节、膝关节和踝关节的运动学和动力学。记录股四头肌、股二头肌、胫前肌和腓肠肌外侧肌的肌电活动时间。能量消耗由耗氧量测量计算得出。-所有变量都是速度相关的。在步行周期中，随着步行速度的增加，运动学和动力学峰值幅度增加且出现的时间提前。肌肉活动的时间也随着速度的变化而变化，尽管爆发的次数保持不变。能量成本呈u型曲线，最小值约为4 km h（-1）。将数据与几位作者获得的地上步行数据进行了比较：除了动力学数据外，所有结果都相似，从而否定了跑步机和地上步行的生物力学可能不同的想法。-本研究为正常和病理在跑步机上行走提供参考值，并允许受试者之间的速度依赖比较。(C) 2008 Elsevier Masson SAS。版权所有。
Objective. - Evaluation of normal and pathological gait on the level. ground has drawbacks that could be overcome by walking on a treadmill. The present work was designed to assess the feasibility of extended gait analysis on a treadmill allowing multiple steps recording at a constant speed in young healthy subjects. It also aimed to provide speed-specific kinematic kinetic, electromyographic and energetic reference values.Method. - Twelve healthy volunteers (23 two years) walked on a force measuring treadmill at six speeds (1-6 km h(-1)). Kinematics and kinetics were analysed at the hip, knee and ankle. Electromyographic muscle activity timing of quadriceps femoris, biceps femoris, tibialis anterior and lateral gastrocnemius was recorded. The energy cost was computed from oxygen consumption measurement.Results. - All variables were speed-dependent. Kinematics and kinetics peaks amplitude increased and occurred earlier during the walking cycle with increasing walking speed. Muscle activity timing also changed with speed, although the number of bursts remained constant. The energetic cost presented a U-shaped curve, with minimal values around 4 km h(-1). Data were compared to overground walking data obtained by several authors: all results, except kinetic ones, were similar, turning down the thought that biomechanics of treadmill and overground walking could be different.Conclusion. - This study provides reference values for normal and pathological walking on treadmill and allows speed-dependent comparison between subjects. (C) 2008 Elsevier Masson SAS. All rights reserved.