University of Grenoble Alpes, AGEIS, Grenoble, France.
Grenoble Alpes University Hospital, Grenoble, France.
Sci Rep. 2021 May 13;11(1):10229. doi: 10.1038/s41598-021-88794-4.
Inertial measurement units (IMUs) are increasingly popular and may be usable in clinical routine to assess gait. However, assessing their intra-session reliability is crucial and has not been tested with foot-worn sensors in healthy participants. The aim of this study was to assess the intra-session reliability of foot-worn IMUs for measuring gait parameters in healthy adults. Twenty healthy participants were enrolled in the study and performed the 10-m walk test in single- and dual-task ('carrying a full cup of water') conditions, three trials per condition. IMUs were used to assess spatiotemporal gait parameters, gait symmetry parameters (symmetry index (SI) and symmetry ratio (SR)), and dual task effects parameters. The relative and the absolute reliability were calculated for each gait parameter. Results showed that spatiotemporal gait parameters measured with foot-worn inertial sensors were reliable; symmetry gait parameters relative reliability was low, and SR showed better absolute reliability than SI; dual task effects were poorly reliable, and taking the mean of the second and the third trials was the most reliable. Foot-worn IMUs are reliable to assess spatiotemporal and symmetry ratio gait parameters but symmetry index and DTE gait parameters reliabilities were low and need to be interpreted with cautious by clinicians and researchers.
惯性测量单元（IMU）越来越受欢迎，可用于评估步态的临床常规。然而，评估其会话内可靠性至关重要，并且尚未在健康参与者中使用脚部佩戴的传感器进行测试。本研究旨在评估脚部佩戴的 IMU 在测量健康成年人步态参数方面的会话内可靠性。20 名健康参与者参与了这项研究，在单任务和双任务（“端着满满一杯水”）条件下进行了 10 米步行测试，每种条件下进行 3 次测试。IMU 用于评估时空步态参数、步态对称参数（对称指数（SI）和对称比（SR））和双重任务影响参数。计算了每个步态参数的相对可靠性和绝对可靠性。结果表明，使用脚部惯性传感器测量的时空步态参数是可靠的；对称步态参数的相对可靠性较低，而 SR 比 SI 具有更好的绝对可靠性；双重任务效果的可靠性较差，取第二和第三次试验的平均值是最可靠的。脚部佩戴的 IMU 可用于评估时空和对称比步态参数，但对称指数和 DTE 步态参数的可靠性较低，临床医生和研究人员需要谨慎解释。
