Gait recording with inertial sensors – How to determine initial and terminal contact

Abstract Lightweight inertial sensors are increasingly used for recording of gait in medicine, rehabilitation and sport. Several distinct events during the gait cycle such as heel-strike or toe-off have to be detected in the data obtained from these sensors. We re-investigated the correlation betwee...

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Bibliographic Details
Published in:Journal of biomechanics 2016-02, Vol.49 (3), p.332-337
Main Authors: Bötzel, Kai, Marti, Fernando Martinez, Rodríguez, Miguel Ángel Carvajal, Plate, Annika, Vicente, Alberto Olivares
Format: Article
Language:English
Subjects:
Accelerometers
Accelerometry
Adult
Correlation
Gait
Gait analysis
Gyroscopes
Heel - physiology
Humans
Inertial
Inertial sensors
Male
Physical Medicine and Rehabilitation
Pressure
Recording
Sensors
Shoes
Strikes
Studies
Velocity
Walking - physiology
Weight reduction
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Summary:Abstract Lightweight inertial sensors are increasingly used for recording of gait in medicine, rehabilitation and sport. Several distinct events during the gait cycle such as heel-strike or toe-off have to be detected in the data obtained from these sensors. We re-investigated the correlation between the data of shank-mounted gyroscopes and three reference systems, namely accelerometers, pressure-sensitive soles and a motion capture system in a group of 14 young healthy men. We confirmed that the heel strike corresponds to a trough in the gyroscope curve, as several previous reports have stated. However, the toe-off moment clearly did not coincide with another trough of the gyroscope trace, as had been assumed in the past. The heel-off moment was reliably at 51% of the step cycle, irrespective of gait velocity, in our data. These findings are crucial for gait recording systems which aim to assess the temporal as well as spatial descriptors of human gait.
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2015.12.035