Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process
The timely assessment of muscle fatigue makes sense for reducing the risk of musculoskeletal injury during exercise. In general, muscle fatigue is accompanied by physiological changes. These changes affect the acoustic transmission properties of the skeletal muscles. This study investigated the vari...
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MDPI AG
2023-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/2/947 |
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| author | Pan Li Guanjun Yin Shibo Nie Jianzhong Guo |
| author_facet | Pan Li Guanjun Yin Shibo Nie Jianzhong Guo |
| author_sort | Pan Li |
| collection | DOAJ |
| description | The timely assessment of muscle fatigue makes sense for reducing the risk of musculoskeletal injury during exercise. In general, muscle fatigue is accompanied by physiological changes. These changes affect the acoustic transmission properties of the skeletal muscles. This study investigated the variation of the acoustic transmission spectrum (ATS) of human upper arm muscles during sustained static contractions (SC). Based on the B-ultrasound image and radiofrequency (RF) ultrasonic echoes, we abstracted the RF echo signals from the subcutaneous fatty/fascia (SFF) and deep fascia/bone (DFB) interfaces. By dividing the echo spectrum of the DFB by the spectrum of the SFF, we obtained the ATS of the upper arm muscles. Then, by fitting the ATS with both the linear function (<i>A</i>(<i>f</i>) = <i>af + b</i>) and power-law function (<i>A</i>(<i>f</i>) = <i>αƒ<sup>β</sup></i>), we analyzed the variations of <i>a</i>, <i>b</i>, <i>α</i>, and <i>β</i> along with the SC process of skeletal muscle. As muscle fatigue increases, the slope <i>a</i> decreases and the intercept <i>b</i> increases linearly; the <i>α</i> increases exponentially and <i>β</i> decreases linearly. In addition, the variation magnitude of ATS relates to the maximum voluntary contraction (MVC) force and the strength of the SC motion. These results suggest that a comprehensive analysis of ATS is a potential metric for assessing muscle fatigue. |
| first_indexed | 2024-03-09T13:43:29Z |
| format | Article |
| id | doaj.art-a5e387b80f984c5eaaf618acadca774d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T13:43:29Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-a5e387b80f984c5eaaf618acadca774d2023-11-30T21:03:58ZengMDPI AGApplied Sciences2076-34172023-01-0113294710.3390/app13020947Variation of Acoustic Transmission Spectrum during the Muscle Fatigue ProcessPan Li0Guanjun Yin1Shibo Nie2Jianzhong Guo3School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaKey Laboratory of Modern Teaching Technology, Shaanxi Normal University, Xi’an 710062, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, ChinaThe timely assessment of muscle fatigue makes sense for reducing the risk of musculoskeletal injury during exercise. In general, muscle fatigue is accompanied by physiological changes. These changes affect the acoustic transmission properties of the skeletal muscles. This study investigated the variation of the acoustic transmission spectrum (ATS) of human upper arm muscles during sustained static contractions (SC). Based on the B-ultrasound image and radiofrequency (RF) ultrasonic echoes, we abstracted the RF echo signals from the subcutaneous fatty/fascia (SFF) and deep fascia/bone (DFB) interfaces. By dividing the echo spectrum of the DFB by the spectrum of the SFF, we obtained the ATS of the upper arm muscles. Then, by fitting the ATS with both the linear function (<i>A</i>(<i>f</i>) = <i>af + b</i>) and power-law function (<i>A</i>(<i>f</i>) = <i>αƒ<sup>β</sup></i>), we analyzed the variations of <i>a</i>, <i>b</i>, <i>α</i>, and <i>β</i> along with the SC process of skeletal muscle. As muscle fatigue increases, the slope <i>a</i> decreases and the intercept <i>b</i> increases linearly; the <i>α</i> increases exponentially and <i>β</i> decreases linearly. In addition, the variation magnitude of ATS relates to the maximum voluntary contraction (MVC) force and the strength of the SC motion. These results suggest that a comprehensive analysis of ATS is a potential metric for assessing muscle fatigue.https://www.mdpi.com/2076-3417/13/2/947muscle fatigueacoustic transmission spectrumRF ultrasonic echostatic contraction |
| spellingShingle | Pan Li Guanjun Yin Shibo Nie Jianzhong Guo Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process Applied Sciences muscle fatigue acoustic transmission spectrum RF ultrasonic echo static contraction |
| title | Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process |
| title_full | Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process |
| title_fullStr | Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process |
| title_full_unstemmed | Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process |
| title_short | Variation of Acoustic Transmission Spectrum during the Muscle Fatigue Process |
| title_sort | variation of acoustic transmission spectrum during the muscle fatigue process |
| topic | muscle fatigue acoustic transmission spectrum RF ultrasonic echo static contraction |
| url | https://www.mdpi.com/2076-3417/13/2/947 |
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