Publication: Accuracy and Repeatability of Spatiotemporal Gait Parameters Measured with an Inertial Measurement Unit
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Publication Date
2021-04-21
Authors
Posada Ordax, Jorge
Cosín Matamoros, Julia María
Losa Iglesias, Marta Elena
Becerro de Bengoa-Vallejo, Ricardo
Martín Villa, Carlos
Rodriguez Sanz, David
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MPDI
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Abstract
In recent years, interest in finding alternatives for the evaluation of mobility has increased. Inertial measurement units (IMUs) stand out for their portability, size, and low price. The objective of this study was to examine the accuracy and repeatability of a commercially available IMU under controlled conditions in healthy subjects. A total of 36 subjects, including 17 males and 19 females were analyzed with a Wiva Science IMU in a corridor test while walking for 10 m and in a threadmill at 1.6 km/h, 2.4 km/h, 3.2 km/h, 4 km/h, and 4.8 km/h for one minute. We found no difference when we compared the variables at 4 km/h and 4.8 km/h. However, we found greater differences and errors at 1.6 km/h, 2.4 km/h and 3.2 km/h, and the latter one (1.6 km/h) generated more error. The main conclusion is that the Wiva Science IMU is reliable at high speeds but loses reliability at low speeds.