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Updated: May 25, 2026

Home-Based Monitor for Gait and Activity Analysis
Published on: August 8, 2019
Estimation of traversed distance in level walking using a single inertial measurement unit attached to the waist
Alper Kose1, Andrea Cereatti, Ugo Della Croce
1Department of Biomedical Sciences, University of Sassari, Sassari, Italy. akose@uniss.it
Abstract:
A method for estimating step length during level walking using a single inertial measurement unit is proposed. A combination of an optimally filtered direct and reverse integration technique and a velocity update technique for the initial velocity values identification was implemented to reduce the effects of the acceleration signals drift. The method takes advantage of the cyclic nature of gait. The inertial measurement unit was placed at waist level on the right side and the method was validated on eight subjects walking for 75 m while varying their speed. The traversed distance was estimated with an average error equal to 0.8% of the total walking distance.
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