| Title: | Decomposition of tensiomyogram and comparison with torque twitch responses after post-activation potentiation |
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| Authors: | ID Abazović, Ensar (Author)
ID Paravlić, Armin (Author)
ID Zubac, Damir (Author)
ID Kovačević, Erol (Author)
ID Šimunič, Boštjan (Author) |
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| Files: |  PDF - Presentation file, download (1,52 MB)
MD5: 062CCD9FD404C4C7395F46E8F7E836B9
 URL - Source URL, visit https://www.ismni.org/jmni/pdf/89/jmni_22_316.pdf
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZRS Koper - Science and Research Centre Koper
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| Abstract: | Objectives: This study evaluates the effect of post-activation potentiation (PAP) after 5x5s maximal voluntary isometric contractions (activation stimulus, AS) on tensiomyography (TMG) and torque twitch contractile parameters of vastus lateralis (VL) and medialis (VM), respectively. Further, we validated the decomposition of TMG response to separate responses of three fiber types. Methods: 15 healthy individuals participated in this study (40% women; age 19±2.3 years). A decomposition of VL TMG response was done after optimal fitting of three exponential curves. Results: We found main effects in contraction time (Tc) for muscle, method and time. Furthermore, we found interactions between muscle*method, method*time and muscle*method*time. Compared to PRE AS, we found shorter TMG Tc in VL and VM during the first two minutes after AS. Torque Tc remained unchanged in VL, while it increased in VM within 30 seconds after AS. A decomposition of VL TMG response confirmed PAP effects being present only in decomposed type IIb muscle fibers. Conclusion: The TMG is a sensitive method to detect PAP effects with a sensor mounted directly above the muscle belly. After the decomposition of the TMG signal to three separate muscle fiber phenotypes, we provided a non-invasive insight in the contribution of each muscle fiber phenotype to the PAP of the whole muscle. |
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| Keywords: | skeletal muscles, fast-twitch fibers, post-activation potentiation, decomposition, tensiomyography |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Article acceptance date: | 08.03.2022 |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 316-325 |
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| Numbering: | Vol. 22, no. 3 |
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| PID: | 20.500.12556/DiRROS-15435  |
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| UDC: | 612.74:796.012.1 |
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| ISSN on article: | 1108-7161 |
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| COBISS.SI-ID: | 120215555 |
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| Note: | Soavtorji: Armin Paravlić, Damir Zubac, Erol Kovačević, Boštjan Šimunič;
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| Publication date in DiRROS: | 05.09.2022 |
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| Views: | 1253 |
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| Downloads: | 427 |
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