Stoquart G, Detrembleur C, Lejeune T
Physical Medicine and Rehabilitation Department, Université Catholique de Louvain, Cliniques Universitaires Saint-Luc, Brussels, Belgium.
Neurophysiol Clin. 2008 Apr;38(2):105-16. doi: 10.1016/j.neucli.2008.02.002. Epub 2008 Mar 6.
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.
Twelve healthy volunteers (23 +/- two years) walked on a force measuring treadmill at six speeds (1-6 k mh(-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.
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.
This study provides reference values for normal and pathological walking on treadmill and allows speed-dependent comparison between subjects.
在平地上评估正常和病理步态存在一些缺点，而在跑步机上行走可以克服这些缺点。本研究旨在评估在跑步机上进行扩展步态分析的可行性，该分析允许在年轻健康受试者中以恒定速度记录多步。它还旨在提供特定速度的运动学、动力学、肌电图和能量参考值。
12名健康志愿者（23±2岁）在测力跑步机上以六种速度（1-6 km h⁻¹）行走。对髋、膝和踝关节进行运动学和动力学分析。记录股四头肌、股二头肌、胫前肌和腓外侧肌的肌电图肌肉活动时间。通过测量耗氧量计算能量消耗。
所有变量均与速度有关。随着步行速度的增加，运动学和动力学峰值幅度增加，并在步行周期中更早出现。肌肉活动时间也随速度变化，尽管爆发次数保持不变。能量消耗呈现U形曲线，在4 km h⁻¹左右有最小值。将数据与其他作者获得的地面行走数据进行比较：除动力学数据外，所有结果均相似，这否定了跑步机行走和地面行走的生物力学可能不同的观点。
本研究为跑步机上的正常和病理行走提供了参考值，并允许对受试者进行速度相关的比较。
