Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking

We present the use of a single inertial measurement unit (IMU) worn on the thigh to produce stride-by-stride estimates of walking speed and its spatiotemporal determinants (i.e., stride time and stride length). Ten healthy and eight post-stroke individuals completed a 6-min walk test with an 18-came...

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Autores principales:	Dheepak Arumukhom Revi, Stefano M. M. De Rossi, Conor J. Walsh, Louis N. Awad
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	walking speed estimation wearable sensors thigh phase portrait Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/3eee79ca7ff4493cafb85ce6d630ad91
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spelling	oai:doaj.org-article:3eee79ca7ff4493cafb85ce6d630ad912021-11-11T19:01:27ZEstimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking10.3390/s212169761424-8220https://doaj.org/article/3eee79ca7ff4493cafb85ce6d630ad912021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/6976https://doaj.org/toc/1424-8220We present the use of a single inertial measurement unit (IMU) worn on the thigh to produce stride-by-stride estimates of walking speed and its spatiotemporal determinants (i.e., stride time and stride length). Ten healthy and eight post-stroke individuals completed a 6-min walk test with an 18-camera motion capture system used for ground truth measurements. Subject-specific estimation models were trained to estimate walking speed using the polar radius extracted from phase portraits produced from the IMU-measured thigh angular position and velocity. Consecutive flexion peaks in the thigh angular position data were used to define each stride and compute stride times. Stride-by-stride estimates of walking speed and stride time were then used to compute stride length. In both the healthy and post-stroke cohorts, low error and high consistency were observed for the IMU estimates of walking speed (MAE < 0.035 m/s; ICC > 0.98), stride time (MAE < 30 ms; ICC > 0.97), and stride length (MAE < 0.037 m; ICC > 0.96). This study advances the use of a single wearable sensor to accurately estimate walking speed and its spatiotemporal determinants during both healthy and hemiparetic walking.Dheepak Arumukhom ReviStefano M. M. De RossiConor J. WalshLouis N. AwadMDPI AGarticlewalking speed estimationwearable sensorsthighphase portraitChemical technologyTP1-1185ENSensors, Vol 21, Iss 6976, p 6976 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	walking speed estimation wearable sensors thigh phase portrait Chemical technology TP1-1185
spellingShingle	walking speed estimation wearable sensors thigh phase portrait Chemical technology TP1-1185 Dheepak Arumukhom Revi Stefano M. M. De Rossi Conor J. Walsh Louis N. Awad Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
description	We present the use of a single inertial measurement unit (IMU) worn on the thigh to produce stride-by-stride estimates of walking speed and its spatiotemporal determinants (i.e., stride time and stride length). Ten healthy and eight post-stroke individuals completed a 6-min walk test with an 18-camera motion capture system used for ground truth measurements. Subject-specific estimation models were trained to estimate walking speed using the polar radius extracted from phase portraits produced from the IMU-measured thigh angular position and velocity. Consecutive flexion peaks in the thigh angular position data were used to define each stride and compute stride times. Stride-by-stride estimates of walking speed and stride time were then used to compute stride length. In both the healthy and post-stroke cohorts, low error and high consistency were observed for the IMU estimates of walking speed (MAE < 0.035 m/s; ICC > 0.98), stride time (MAE < 30 ms; ICC > 0.97), and stride length (MAE < 0.037 m; ICC > 0.96). This study advances the use of a single wearable sensor to accurately estimate walking speed and its spatiotemporal determinants during both healthy and hemiparetic walking.
format	article
author	Dheepak Arumukhom Revi Stefano M. M. De Rossi Conor J. Walsh Louis N. Awad
author_facet	Dheepak Arumukhom Revi Stefano M. M. De Rossi Conor J. Walsh Louis N. Awad
author_sort	Dheepak Arumukhom Revi
title	Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
title_short	Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
title_full	Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
title_fullStr	Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
title_full_unstemmed	Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking
title_sort	estimation of walking speed and its spatiotemporal determinants using a single inertial sensor worn on the thigh: from healthy to hemiparetic walking
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3eee79ca7ff4493cafb85ce6d630ad91
work_keys_str_mv	AT dheepakarumukhomrevi estimationofwalkingspeedanditsspatiotemporaldeterminantsusingasingleinertialsensorwornonthethighfromhealthytohemipareticwalking AT stefanommderossi estimationofwalkingspeedanditsspatiotemporaldeterminantsusingasingleinertialsensorwornonthethighfromhealthytohemipareticwalking AT conorjwalsh estimationofwalkingspeedanditsspatiotemporaldeterminantsusingasingleinertialsensorwornonthethighfromhealthytohemipareticwalking AT louisnawad estimationofwalkingspeedanditsspatiotemporaldeterminantsusingasingleinertialsensorwornonthethighfromhealthytohemipareticwalking
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Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking

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