20.500.12556/DiRROS-22783 Alterations in Muscle Contractile Properties, Structure, and Function During 10-Day Bed Rest, Post-Recovery, and Following COVID-19 Lockdown We aimed to identify early tensiomyography alterations in six muscles during a 10-day bed rest (BR10), followed by a 30-day recovery period (R+30), and to compare these changes with those observed after the 54-day COVID-19 lockdown in ten healthy males (22.9 ± 5.0 years). Tensiomyography and muscle thickness (sonography) were assessed at baseline, during bed rest, at BR10, R+30, and after the COVID-19 lockdown. Additional assessments included vertical jump performance (force plate), body composition (bioimpedance), physical activity (GPAQ), and lower back pain (VAS). By BR10, participants experienced a 1.9% body mass loss, a 3.8% increase in fat mass, and a 2.4% reduction in muscle mass. While anthropometric parameters returned to baseline by R+30, fat mass increased again by 3.9% post-lockdown. Jump height declined by 10.1% at BR10, returned to baseline at R+30, and remained stable thereafter. Muscle thickness decreased by 7.0% in the vastus lateralis at BR10 and by 10.1% post-lockdown. Tensiomyographic amplitude increased in all five leg muscles prior to BR10, recovered at R+30 and increased again after the COVID-19 lockdown, while a reduction was observed in the erector spinae within the first 48 hours, coinciding with reported lower back pain. In the erector spinae, both delay and contraction time decreased during BR10 and post-lockdown. In contrast, contraction time of the biceps femoris increased before BR10 and remained elevated post-lockdown. Overall, tensiomyographic parameters after the COVID-19 lockdown changed in the same direction as during bed rest, though to a lesser degree, make it a sensitive tool for detecting changes in muscle structural and functional quality after bed rest and reduced activity paradigms. Atrophy Bed rest Physical inactivity Skeletal muscle Tensiomyography true true false Angleški jezik Ni določen Delo ni kategorizirano 2025-06-24 23:43:51 2025-06-25 00:23:34 2025-10-24 03:52:10 0000-00-00 00:00:00 0 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2025-12-24 ReadMe.pdf ReadMe.pdf Splošne infromacije o podatkih in metodologiji zbiranja podatkov. General information about the data and methodology. 1 613BFC3F5D6513519E3F1FE7630A582C cdd69a5e5be2439cf0ab023a153655597c0f7322683d9f426727c56fd2bd5d50 42aadc4c-5148-11f0-8080-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33086 BR_SBI2019_data.xlsx BR_SBI2019_data.xlsx Rezultati vseh opisanih meritev v excel tabeli z legendo. Excel spreadsheet file containing all measured results with a legend. 1 1201CB4C87EEE4BCE3B82AAD557D07D8 0a482c2f2d2971d6cb141ef234323e354edb933166686390eb1d18830fae686b cd0ae72d-5148-11f0-8080-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33087 Znanstveno-raziskovalno središče Koper / Centro di Ricerche Scientifiche Capodistria Meritve in testi: Fizično 0 0 0