Moe-Nilssen Rolf, Helbostad Jorunn L
The Balance and Gait Unit, Section of Physiotherapy Science, Institute of Public Health and Primary Health Care, University of Bergen, Ulriksdal 8c, N-5009 Bergen, Norway.
J Biomech. 2004 Jan;37(1):121-6. doi: 10.1016/s0021-9290(03)00233-1.
This study reports on the novel use of a portable system to measure gait cycle parameters. Measurements were made by a triaxial accelerometer over the lower trunk during timed walking over a range of self-administered speeds. Signals from each trial were transformed to a horizontal-vertical coordinate system and analyzed by an unbiased autocorrelation procedure to obtain cadence, step length, and measures of gait regularity and symmetry. By curvilinear interpolation, speed-dependent gait parameters could be compared at a normalized speed. It was demonstrated that analysis of gait cycle parameters which previously required fixed laboratory equipment and paced walking procedures, now can be made from data obtained by a timing device and a portable sensor at free walking speeds.
本研究报告了一种用于测量步态周期参数的便携式系统的新用途。在一系列自行设定的速度下进行定时行走时，通过三轴加速度计对下躯干进行测量。每次试验的信号被转换到水平-垂直坐标系，并通过无偏自相关程序进行分析，以获得步频、步长以及步态规律性和对称性的测量值。通过曲线插值，可以在归一化速度下比较与速度相关的步态参数。结果表明，以前需要固定实验室设备和定速行走程序的步态周期参数分析，现在可以从由计时装置和便携式传感器在自由行走速度下获得的数据中进行。
