Validity of inertial measurement units in assessing segment angles and mechanical energies of elderly persons during sit-to-stand motion
| Autor: | Moeka Sonoo, Naohiko Kanemura, Taku Miyazawa, Takanori Kokubun, Keisuke Hirata, Keisuke Kubota, Hiroki Hanawa, Tsutomu Fujino |
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| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Motion analysis Mean squared error Correlation coefficient 020208 electrical & electronic engineering 02 engineering and technology Kinematics Geodesy Standard deviation 020901 industrial engineering & automation Tilt (optics) Inertial measurement unit 0202 electrical engineering electronic engineering information engineering Mechanical energy Mathematics |
| Zdroj: | SICE |
| Popis: | The aim of this study was to compare segment angles and mechanical energies obtained via inertial measurement unit (IMU) sensors attached to body segments and an optoelectronic motion capture (OMC) system during sit-to-stand motion, relevant for the assessment of movement disorder in elderly persons. seven elderly subjects were included in this study. Each subject performed sit-to-stand motions under the following two conditions: (1) rising with natural speed and posture (NORMAL) and (2) rising with trunk inclined forward (TILT). We calculated not only the segment angle but also the mechanical energy of each segment. Temporal profiles of the angles and mechanical energies of each segment were compared between the OMC data and the IMU data based on the Pearson's correlation coefficient (r) and root mean squared error (RMSE). The estimation error of the peak values of the data was also investigated with Bland-Altman bias and 95% limits of agreement. It was found that the value of r was >0.90 and the RMSE was |
| Databáze: | OpenAIRE |
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