A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures
Custom-made dynamometry was shown to objectively analyze human muscle strength around the ankle joint with accuracy, easy portability and low costs. This paper describes the full method of calibration and measurement setup and the measurement procedure when capturing ankle torque for establishing re...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/1/135 |
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| author | Iulia Iovanca Drăgoi Florina Georgeta Popescu Teodor Petrița Romulus Fabian Tatu Cosmina Ioana Bondor Carmen Tatu Frank L. Bowling Neil D. Reeves Mihai Ionac |
| author_facet | Iulia Iovanca Drăgoi Florina Georgeta Popescu Teodor Petrița Romulus Fabian Tatu Cosmina Ioana Bondor Carmen Tatu Frank L. Bowling Neil D. Reeves Mihai Ionac |
| author_sort | Iulia Iovanca Drăgoi |
| collection | DOAJ |
| description | Custom-made dynamometry was shown to objectively analyze human muscle strength around the ankle joint with accuracy, easy portability and low costs. This paper describes the full method of calibration and measurement setup and the measurement procedure when capturing ankle torque for establishing reliability of a portable custom-built electronic dynamometer. After considering the load cell offset voltage, the pivotal position was determined, and calibration with loads followed. Linear regression was used for calculating the proportionality constant between torque and measured voltage. Digital means were used for data collection and processing. Four healthy consenting participants were enrolled in the study. Three consecutive maximum voluntary isometric contractions of five seconds each were registered for both feet during plantar flexion/dorsiflexion, and ankle torque was then calculated for three ankle inclinations. A calibration procedure resulted, comprising determination of the pivotal axis and pedal constant. Using the obtained data, a measurement procedure was proposed. Obtained contraction time graphs led to easier filtering of the results. When calculating the interclass correlation, the portable apparatus demonstrated to be reliable when measuring ankle torque. When a custom-made dynamometer was used for capturing ankle torque, accuracy of the method was assured by a rigorous calibration and measurement protocol elaboration. |
| first_indexed | 2024-03-10T03:22:20Z |
| format | Article |
| id | doaj.art-a7790bcfb88f4fe1ba56f4fc04484716 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T03:22:20Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a7790bcfb88f4fe1ba56f4fc044847162023-11-23T12:17:26ZengMDPI AGSensors1424-82202021-12-0122113510.3390/s22010135A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement ProceduresIulia Iovanca Drăgoi0Florina Georgeta Popescu1Teodor Petrița2Romulus Fabian Tatu3Cosmina Ioana Bondor4Carmen Tatu5Frank L. Bowling6Neil D. Reeves7Mihai Ionac8Department of Vascular Surgery and Reconstructive Microsurgery, “Victor Babeș” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaDiscipline of Occupational Health, “Victor Babeş” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaDepartment of Communications, Politehnica University Timișoara, 2 Vasile Pârvan, 300223 Timisoara, RomaniaDepartment of Orthopaedics-Traumatology-Urology and Imagistics, “Victor Babeș” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaDepartment of Medical Informatics and Biostatistics, University of Medicine and Pharmacy “Iuliu Hațieganu”, 8 Victor Babeș, 400000 Cluj-Napoca, RomaniaDepartment of Functional Sciences, Physiology, Center of Immuno-Physiology and Biotechnologies, “Victor Babeş” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaDepartment of Vascular Surgery and Reconstructive Microsurgery, “Victor Babeș” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaResearch Centre for Musculoskeletal Science & Sports Medicine, Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Oxford Rd., Manchester M1 5GD, UKDepartment of Vascular Surgery and Reconstructive Microsurgery, “Victor Babeș” University of Medicine and Pharmacy, 2 Eftimie Murgu Square, 300041 Timisoara, RomaniaCustom-made dynamometry was shown to objectively analyze human muscle strength around the ankle joint with accuracy, easy portability and low costs. This paper describes the full method of calibration and measurement setup and the measurement procedure when capturing ankle torque for establishing reliability of a portable custom-built electronic dynamometer. After considering the load cell offset voltage, the pivotal position was determined, and calibration with loads followed. Linear regression was used for calculating the proportionality constant between torque and measured voltage. Digital means were used for data collection and processing. Four healthy consenting participants were enrolled in the study. Three consecutive maximum voluntary isometric contractions of five seconds each were registered for both feet during plantar flexion/dorsiflexion, and ankle torque was then calculated for three ankle inclinations. A calibration procedure resulted, comprising determination of the pivotal axis and pedal constant. Using the obtained data, a measurement procedure was proposed. Obtained contraction time graphs led to easier filtering of the results. When calculating the interclass correlation, the portable apparatus demonstrated to be reliable when measuring ankle torque. When a custom-made dynamometer was used for capturing ankle torque, accuracy of the method was assured by a rigorous calibration and measurement protocol elaboration.https://www.mdpi.com/1424-8220/22/1/135ankle torquedynamometermuscle strengthcalibrationlinear regressionreliability |
| spellingShingle | Iulia Iovanca Drăgoi Florina Georgeta Popescu Teodor Petrița Romulus Fabian Tatu Cosmina Ioana Bondor Carmen Tatu Frank L. Bowling Neil D. Reeves Mihai Ionac A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures Sensors ankle torque dynamometer muscle strength calibration linear regression reliability |
| title | A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures |
| title_full | A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures |
| title_fullStr | A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures |
| title_full_unstemmed | A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures |
| title_short | A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures |
| title_sort | custom made lower limb dynamometer for assessing ankle joint torque in humans calibration and measurement procedures |
| topic | ankle torque dynamometer muscle strength calibration linear regression reliability |
| url | https://www.mdpi.com/1424-8220/22/1/135 |
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