Assessing the Validity of the Ergotex IMU in Joint Angle Measurement: A Comparative Study with Optical Tracking Systems
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Título: | Assessing the Validity of the Ergotex IMU in Joint Angle Measurement: A Comparative Study with Optical Tracking Systems |
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Autor/es: | Jimenez-Olmedo, Jose Manuel | Tortosa-Martínez, Juan | Cortell-Tormo, Juan M. | Pueo, Basilio |
Grupo/s de investigación o GITE: | Salud, Actividad Física y Tecnología Deportiva (HEALTH-TECH) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Didáctica General y Didácticas Específicas |
Palabras clave: | Accelerometer | Wearable | Instrumentation | Movement | Kinematics |
Fecha de publicación: | 16-mar-2024 |
Editor: | MDPI |
Cita bibliográfica: | Sensors. 2024, 24(6): 1903. https://doi.org/10.3390/s24061903 |
Resumen: | An observational, repeated measures design was used in this study to assess the validity of the Ergotex Inertial Measurement Unit (IMU) against a 3D motion capture system for measuring trunk, hip, and shoulder angles in ten healthy adult males (38.8 ± 7.3 y, bodyweight 79.2 ± 115.9 kg, body height 179.1 ± 8.1 cm). There were minimal systematic differences between the devices, with the most significant discrepancy being 1.4 degrees for the 80-degree target angle, denoting Ergotex’s precision in joint angle measurements. These results were statistically significant (p < 0.001), with predominantly trivial to small effect sizes, indicating high accuracy for clinical and biomechanical applications. Bland–Altman analysis showed Limits of Agreement (LoA) approximately ±2.5 degrees across all angles and positions, with overall LoA ranging from 3.6 to −2.4 degrees, reflecting Ergotex’s consistent performance. Regression analysis indicated uniform variance across measurements, with minor heteroscedastic errors producing a negligible underestimation trend of around 0.5 degrees in some instances. In conclusion, the Ergotex IMU is a reliable tool for accurate joint angle measurements. It offers a practical and cost-effective alternative to more complex systems, particularly in settings where precise measurement is essential. |
Patrocinador/es: | This research was funded by the Valencian Innovation Agency of Spain (grant number INNVA1/2020/81). |
URI: | http://hdl.handle.net/10045/141555 |
ISSN: | 1424-8220 |
DOI: | 10.3390/s24061903 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/s24061903 |
Aparece en las colecciones: | INV - HEALTH-TECH - Artículos de Revistas |
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