Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task
The purpose of this study was to compare electromyographic (EMG) with mechanomyographic (MMG) recordings during isometric conditions, and during a simulated load-lifting task. Twenty-two males (age: 25.5 ± 5.3 years) first performed maximal voluntary contractions (MVC) and submaximal isometric contr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/18/7969 |
| _version_ | 1797576981980643328 |
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| author | Matthieu Correa Maxime Projetti Isabelle A. Siegler Nicolas Vignais |
| author_facet | Matthieu Correa Maxime Projetti Isabelle A. Siegler Nicolas Vignais |
| author_sort | Matthieu Correa |
| collection | DOAJ |
| description | The purpose of this study was to compare electromyographic (EMG) with mechanomyographic (MMG) recordings during isometric conditions, and during a simulated load-lifting task. Twenty-two males (age: 25.5 ± 5.3 years) first performed maximal voluntary contractions (MVC) and submaximal isometric contractions of upper limb muscles at 25%, 50% and 75% MVC. Participants then executed repetitions of a functional activity simulating a load-lifting task above shoulder level, at 25%, 50% and 75% of their maximum activity (based on MVC). The low-frequency part of the accelerometer signal (<5 Hz) was used to segment the six phases of the motion. EMG and MMG were both recorded during the entire experimental procedure. Root mean square (RMS) and mean power frequency (MPF) were selected as signal extraction features. During isometric contractions, EMG and MMG exhibited similar repeatability scores. They also shared similar RMS vs. force relationship, with RMS increasing to 75% MVC and plateauing to 100%. MPF decreased with increasing force to 75% MVC. In dynamic condition, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>R</mi><mi>M</mi><msub><mi>S</mi><mrow><mi>M</mi><mi>M</mi><mi>G</mi></mrow></msub></mrow></semantics></math></inline-formula> exhibited higher sensitivity to changes in load than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>R</mi><mi>M</mi><msub><mi>S</mi><mrow><mi>E</mi><mi>M</mi><mi>G</mi></mrow></msub></mrow></semantics></math></inline-formula>. These results confirm the feasibility of MMG measurements to be used during functional activities outside the laboratory. It opens new perspectives for future applications in sports science, ergonomics and human–machine interface conception. |
| first_indexed | 2024-03-10T22:01:28Z |
| format | Article |
| id | doaj.art-783314de424b40efbdde8fe8a785b454 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T22:01:28Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-783314de424b40efbdde8fe8a785b4542023-11-19T12:56:49ZengMDPI AGSensors1424-82202023-09-012318796910.3390/s23187969Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting TaskMatthieu Correa0Maxime Projetti1Isabelle A. Siegler2Nicolas Vignais3Laboratoire CIAMS (Complexité, Innovation, Activités Motrices et Sportives), Université Paris-Saclay, CEDEX, 91405 Orsay, FranceMoten Technologies, 92800 Puteaux, FranceLaboratoire CIAMS (Complexité, Innovation, Activités Motrices et Sportives), Université Paris-Saclay, CEDEX, 91405 Orsay, FranceLaboratoire CIAMS (Complexité, Innovation, Activités Motrices et Sportives), Université Paris-Saclay, CEDEX, 91405 Orsay, FranceThe purpose of this study was to compare electromyographic (EMG) with mechanomyographic (MMG) recordings during isometric conditions, and during a simulated load-lifting task. Twenty-two males (age: 25.5 ± 5.3 years) first performed maximal voluntary contractions (MVC) and submaximal isometric contractions of upper limb muscles at 25%, 50% and 75% MVC. Participants then executed repetitions of a functional activity simulating a load-lifting task above shoulder level, at 25%, 50% and 75% of their maximum activity (based on MVC). The low-frequency part of the accelerometer signal (<5 Hz) was used to segment the six phases of the motion. EMG and MMG were both recorded during the entire experimental procedure. Root mean square (RMS) and mean power frequency (MPF) were selected as signal extraction features. During isometric contractions, EMG and MMG exhibited similar repeatability scores. They also shared similar RMS vs. force relationship, with RMS increasing to 75% MVC and plateauing to 100%. MPF decreased with increasing force to 75% MVC. In dynamic condition, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>R</mi><mi>M</mi><msub><mi>S</mi><mrow><mi>M</mi><mi>M</mi><mi>G</mi></mrow></msub></mrow></semantics></math></inline-formula> exhibited higher sensitivity to changes in load than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>R</mi><mi>M</mi><msub><mi>S</mi><mrow><mi>E</mi><mi>M</mi><mi>G</mi></mrow></msub></mrow></semantics></math></inline-formula>. These results confirm the feasibility of MMG measurements to be used during functional activities outside the laboratory. It opens new perspectives for future applications in sports science, ergonomics and human–machine interface conception.https://www.mdpi.com/1424-8220/23/18/7969mechanomyographyelectromyographyisometric contractionsdynamic contractionsload-lifting |
| spellingShingle | Matthieu Correa Maxime Projetti Isabelle A. Siegler Nicolas Vignais Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task Sensors mechanomyography electromyography isometric contractions dynamic contractions load-lifting |
| title | Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task |
| title_full | Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task |
| title_fullStr | Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task |
| title_full_unstemmed | Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task |
| title_short | Mechanomyographic Analysis for Muscle Activity Assessment during a Load-Lifting Task |
| title_sort | mechanomyographic analysis for muscle activity assessment during a load lifting task |
| topic | mechanomyography electromyography isometric contractions dynamic contractions load-lifting |
| url | https://www.mdpi.com/1424-8220/23/18/7969 |
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