Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4971979 | Applied Ergonomics | 2017 | 9 Pages |
â¢An iPhone application for measuring upper arm postures and movements is presented.â¢The accuracy of the application compares well with the gold standard method.â¢The application has higher accuracy for fast movements than standard inclinometry.â¢The convenience and low cost make the application good for practical use.
There is a need for objective methods for upper arm elevation measurements for accurate and convenient risk assessments. The aims of this study were (i) to compare a newly developed iOS application (iOS) for measuring upper arm elevation and angular velocity with a reference optical tracking system (OTS), and (ii) to compare the accuracy of the iOS incorporating a gyroscope and an accelerometer with using only an accelerometer, which is standard for inclinometry. The iOS-OTS limits of agreement for static postures (9 subjects) were â4.6° and 4.8°. All root mean square differences in arm swings and two simulated work tasks were <6.0°, and all mean correlation coefficients were >0.98. The mean absolute iOS-OTS difference of median angular velocity was <13.1°/s, which was significantly lower than only using an accelerometer (<43.5°/s). The accuracy of this iOS application compares well to that of today's research methods and it can be useful for practical upper arm measurements.
Graphical abstractDownload high-res image (382KB)Download full-size image