20.500.12556/DiRROS-15435 Decomposition of tensiomyogram and comparison with torque twitch responses after post-activation potentiation 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. skeletal muscles fast-twitch fibers post-activation potentiation decomposition tensiomyography skeletne mišice hitra mišična vlakna post-aktivacijski potencial PAP tenziomiografija true false true Angleški jezik Slovenski jezik Neznano 2022-09-05 12:56:43 2022-09-05 12:56:45 2022-09-07 03:38:00 0000-00-00 00:00:00 2022 0 0 Soavtorji: Armin Paravlić, Damir Zubac, Erol Kovačević, Boštjan Šimunič; str. 316-325 no. 3 Vol. 22 Sep. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 2022-03-08 0000-00-00 612.74:796.012.1 1108-7161 120215555 ZRSKP_ParavlicA_120215555.pdf ZRSKP_ParavlicA_120215555.pdf 1 062CCD9FD404C4C7395F46E8F7E836B9 8736dbeb4df3b4f9f49ee482344f58d865f7245fe9f4e6764993fba8fc9ba322 b4cfd395-2db0-11ed-bea5-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20440 https://www.ismni.org/jmni/pdf/89/jmni_22_316.pdf 0 775b410c-2cfc-11ed-bea5-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20417 Znanstveno-raziskovalno središče Koper / Centro di Ricerche Scientifiche Capodistria 0 0 0