Research Article
Volume 12 Issue 4 - 2021
Validation of a Synchronized Smartphone-Based Gait Analysis System
Mitsuaki Noda1*, Hironori Ohhigashi2, Takehiko Matsushita3, Atsuyuki Inui3, Takahiro Niikura3 and Shin Ohsawa4
1Department of Orthopaedics, Nishi Hospital, Kobe, Japan
2Osaka University Graduate School of Engineering Science, Japan
3Department of Orthopedics, Kobe University Graduate School of Medicine, Japan
4Department of Orthopedics, Konan Hospital, Japan
*Corresponding Author: Mitsuaki Noda, Department of Orthopaedics, Nishi Hospital, Kobe, Japan.
Received: February 10, 2021; Published: March 30, 2021


Background: Current smartphones are able to capture high quality videos, which have been used to measure movements such as gait and rhythm. Since the use of a single smartphone has several limitations, we propose a simple custom-built gait analysis system using three synchronized smartphones.

Methods: Walking of the healthy participants was recorded simultaneously with the proposed custom-built and the commercially available system. Static images from the captured videos were used for analysis of the temporal (stride time, stance time, double stance time, and swing time) and length (stride length and step length) parameters of the gait cycle. Three examiners evaluated the images separately, and the means of the results represented each index in our system.

 Our system demonstrated satisfactory interchangeability with it, underestimating the stride time and swing time and overestimating stance time, double stance time, stride length and step length by an average measurement lower than 0.049 (sec), or 0.57 (cm) respectively.

Conclusion: The proposed custom-built gait analysis system may be a reliable alternative to the commercially available system. The simplicity and functionality of the custom-built system is applicable to almost all hospital settings and would be beneficial for the evaluation of gait in postoperative patients.

Keywords: Gait Analysis; Smartphone; Correlation; Direct Linear Transformation


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Citation: Mitsuaki Noda., et al. “Validation of a Synchronized Smartphone-Based Gait Analysis System”. EC Orthopaedics 12.4 (2021): 74-86.

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