Year: 2024 | Month: March | Volume: 14 | Issue: 3 | Pages: 284-294
DOI: https://doi.org/10.52403/ijhsr.20240341
Smartphone IMU Integration: Precision Boost for Sit-to-Stand Test with the Equilibrium Mobile Application
Prathamesh Mantri1, Ami Mehta2, Karan Kanchan3, Harsh Holalad4
1,2,3,4Vayu Technology, CA, USA
Corresponding Author: Harsh Holalad
ABSTRACT
This study introduces an innovative approach that integrates the Inertial Measurement Unit (IMU) sensor of a smartphone for conducting the 5 Times Sit to Stand Test (5xSST) through the Equilibrium by Vayu Technology (EQ) mobile application. Engaging a sample of 16 participants, the research utilized the EQ mobile application for data acquisition during the 5xSST, in parallel with high-speed video recording of the participants executing the test. The video footage was then rigorously annotated by three independent experts. A comparative analysis of the data from the EQ mobile application and the annotated video revealed a significant level of precision, matching, and/or surpassing benchmarks set in existing research. Additionally, this study incorporates kinematic analysis for the 5 Times Sit to Stand Test (5xSST), providing a comprehensive evaluation of participants' movements.
The Root Mean Square Error (RMSE) of this method stands at 3.26%, notably better than the results of traditional methods. The absolute error for the total duration of the 5xSST was recorded at 0.16 ± 0.1 seconds, which is consistent with the ranges reported in the literature. Additionally, a percentage error of 1.3 ± 0.84% highlights the accuracy and reliability of this smartphone-based approach. This study marks a significant advancement in functional mobility assessments, leveraging mobile technology to achieve greater precision and methodological rigor, thereby contributing a valuable perspective to the domain of health assessments.
Key words: Inertial Measurement Unit (IMU),5 Times Sit to Stand Test (5xSST), Equilibrium (EQ) mobile application, Kinematic analysis, Functional mobility assessments, Smartphone-based health assessment, Precision and accuracy.