Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy
In physiotherapy, there is still a lack of practical measurement options to track the progress of therapy or rehabilitation following injuries to the lower limbs objectively and reproducibly yet simply and with minimal effort and time. We aim at filling this gap with the design of an IMU (inertial m...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Diagnostics |
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| Online Access: | https://www.mdpi.com/2075-4418/12/7/1640 |
| _version_ | 1797406786950529024 |
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| author | Jürgen Mitternacht Aljoscha Hermann Patrick Carqueville |
| author_facet | Jürgen Mitternacht Aljoscha Hermann Patrick Carqueville |
| author_sort | Jürgen Mitternacht |
| collection | DOAJ |
| description | In physiotherapy, there is still a lack of practical measurement options to track the progress of therapy or rehabilitation following injuries to the lower limbs objectively and reproducibly yet simply and with minimal effort and time. We aim at filling this gap with the design of an IMU (inertial measurement unit) system with only one sensor placed on the tibia edge. In our study, the IMU system evaluated a set of 10 motion tests by a score value for each test and stored them in a database for a more reliable longitudinal assessment of the progress. The sensor analyzed the different motion patterns and obtained characteristic physiological parameters, such as angle ranges, and spatial and angular displacements, such as knee valgus under load. The scores represent the patient’s coordination, stability, strength and speed. To validate the IMU system, these scores were compared to corresponding values from a simultaneously recorded marker-based 3D video motion analysis of the measurements from five healthy volunteers. Score differences between the two systems were almost always within 1–3 degrees for angle measurements. Timing-related measurements were nearly completely identical. The tests on the valgus stability of the knee showed equally small deviations but should nevertheless be repeated with patients, because the healthy subjects showed no signs of instability. |
| first_indexed | 2024-03-09T03:31:40Z |
| format | Article |
| id | doaj.art-9c0bdf74ae9149b79dadb4ceb22655ff |
| institution | Directory Open Access Journal |
| issn | 2075-4418 |
| language | English |
| last_indexed | 2024-03-09T03:31:40Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj.art-9c0bdf74ae9149b79dadb4ceb22655ff2023-12-03T14:54:47ZengMDPI AGDiagnostics2075-44182022-07-01127164010.3390/diagnostics12071640Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in PhysiotherapyJürgen Mitternacht0Aljoscha Hermann1Patrick Carqueville2Sport Equipment and Materials, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, GermanySport Equipment and Materials, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, GermanySport Equipment and Materials, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, GermanyIn physiotherapy, there is still a lack of practical measurement options to track the progress of therapy or rehabilitation following injuries to the lower limbs objectively and reproducibly yet simply and with minimal effort and time. We aim at filling this gap with the design of an IMU (inertial measurement unit) system with only one sensor placed on the tibia edge. In our study, the IMU system evaluated a set of 10 motion tests by a score value for each test and stored them in a database for a more reliable longitudinal assessment of the progress. The sensor analyzed the different motion patterns and obtained characteristic physiological parameters, such as angle ranges, and spatial and angular displacements, such as knee valgus under load. The scores represent the patient’s coordination, stability, strength and speed. To validate the IMU system, these scores were compared to corresponding values from a simultaneously recorded marker-based 3D video motion analysis of the measurements from five healthy volunteers. Score differences between the two systems were almost always within 1–3 degrees for angle measurements. Timing-related measurements were nearly completely identical. The tests on the valgus stability of the knee showed equally small deviations but should nevertheless be repeated with patients, because the healthy subjects showed no signs of instability.https://www.mdpi.com/2075-4418/12/7/1640exercise feedback systemIMU validationknee and ankle rehabilitationlower-limb-joint kinematicslower-limb motion analysisdynamic knee valgus |
| spellingShingle | Jürgen Mitternacht Aljoscha Hermann Patrick Carqueville Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy Diagnostics exercise feedback system IMU validation knee and ankle rehabilitation lower-limb-joint kinematics lower-limb motion analysis dynamic knee valgus |
| title | Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy |
| title_full | Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy |
| title_fullStr | Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy |
| title_full_unstemmed | Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy |
| title_short | Acquisition of Lower-Limb Motion Characteristics with a Single Inertial Measurement Unit—Validation for Use in Physiotherapy |
| title_sort | acquisition of lower limb motion characteristics with a single inertial measurement unit validation for use in physiotherapy |
| topic | exercise feedback system IMU validation knee and ankle rehabilitation lower-limb-joint kinematics lower-limb motion analysis dynamic knee valgus |
| url | https://www.mdpi.com/2075-4418/12/7/1640 |
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