Step sequence and direction detection of four square step test

Kong, W., Wanning, L., Sessa, S., Zecca, M., Magistro, D. ORCID: 0000-0002-2554-3701, Takeuchi, H., Kawashima, R. and Takanishi, A., 2017. Step sequence and direction detection of four square step test. IEEE Robotics and Automation Letters, 2 (4), pp. 2194-2200. ISSN 2377-3766

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Abstract

Poor balance control and falls are big issues for older adults that due to aging decline have a lower postural balance and directional control in balance performance than younger age groups. The four square step test (FSST) was developed to evaluate rapid stepping that is often required when changing direction and avoiding obstacles while walking. However, previous researchers used only the total time as the assessment in the test. The aim of this letter is to objectively quantify the sequence and direction of the steps in FSST, by using two inertial sensors placed on both feet. An algorithm was developed to automatically segment the steps performed during the test, and calculate the stepping direction from the linear velocity of the foot. Experiments were conducted with 100 Japanese healthy older adults, where sensor data and video of 20 subjects were randomly subtracted for algorithm verification. The results showed that the algorithm succeeded for 71.7% trials in recognizing both the step sequence and step direction in FSST, while 90.2% of the detection failure could be excluded with an auto verification method.

Item Type: Journal article
Publication Title: IEEE Robotics and Automation Letters
Creators: Kong, W., Wanning, L., Sessa, S., Zecca, M., Magistro, D., Takeuchi, H., Kawashima, R. and Takanishi, A.
Publisher: Institute of Electrical and Electronics Engineers
Date: 6 July 2017
Volume: 2
Number: 4
ISSN: 2377-3766
Identifiers:
NumberType
10.1109/lra.2017.2723929DOI
Rights: © 2017 IEEE.
Divisions: Schools > School of Science and Technology
Depositing User: Jonathan Gallacher
Date Added: 10 May 2018 07:51
Last Modified: 10 May 2018 07:51
URI: http://irep.ntu.ac.uk/id/eprint/33502

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