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Blood flow restriction in human skeletal muscle during rest periods after high-load resistance training down-regulates miR-206 and induces Pax7

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Journal of Sport and Health Science 2021年第4期10卷 470-477页

作者： Ferenc Torma Zoltan Gombos marcell fridvalszki Gergely Langmar Zsofia Tarcza Bela Merkely Hisashi Naito Noriko Ichinoseki-Sekine Masaki Takeda Zsolt Murlasits Peter Osvath Zsolt Radak Research Center for Molecular Exercise Science University of Physical EducationBudapest 1123Hungary Department of Kinesiology University of Physical EducationBudapest 1123Hungary Heart and Vascular Center Semmelweis UniversityBudapest 1122Hungary Faculty of Health and Sports Science Juntendo UniversityChiba 270-1695Japan Faculty of Health and Sports Science Doshisha UniversityKyotanabe 610-0394Japan Laboratory of Animal Research Center Qatar UniversityDoha 2713Qatar Department of Health Sciences and Sport Medicine University of Physical EducationBudapest 1123Hungary

Backgroud:Blood flow re striction(BFR) with low-intensity re sistance training has been shown to result in hypertrophy of skeletal *** this study,we tested the hypothesis that BFR during the rest periods between acute,high-intensity resistance exercise sessions(70% of 1 repetition maximum,7 sets with 10 repetitions) enhances the effects of the resistance ***:A total of 7 healthy young men performed squats,and between sets BFR was carried out on one leg while the other leg served as a *** BFR was applied during rest periods,even severe occlusion pressure(approximately 230 mmHg),which almost completely blocked blood flow,was well-tolerated by the *** muscle-specific microRNAs were measured from the biopsy samples,which were taken 2 h after the acute ***:Doppler data showed that the pattern of blood flow recovery changed significantly between the first and last ***-206 levels significantly decreased in the BFR leg compared to the *** mRNA levels of RAC-β serine/threonine-protein kinase v22,nuclear re spiratory factor 1,vascular endothelial growth factor,lupus Ku autoantigen protein p70 genes(p <0.05),and paired box 7(p <0.01) increased in the BFR *** protein levels of paired box 7,nuclear respiratory factor 1,and peroxisome proliferator-activated receptor y coactivator 1α did not differ between the BFR leg and the control ***:BFR,during the rest periods of high-load resistance training,could lead to mRNA elevation of those proteins that regulate angiogenesis,mitochondrial biogenesis,and muscle hypertrophy and ***,BFR also can cause DNA damage,judging from the increase in mRNA levels of lupus Ku autoantigen protein p70.

关键词： Blood flow restriction High-intensity resistance training microRNA Satellite cells

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Blood flow restriction during the resting periods of high-intensity resistance training does not alter performance but decreases MIR-1 and MIR-133A levels in human skeletal muscle

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Sports Medicine and Health Science 2021年第1期3卷 40-45页

作者： Ferenc Torma Peter Bakonyi Zsolt Regdon Zoltan Gombos Matyas Jokai Gergely Babszki marcell fridvalszki Laszl Virg Hisashi Naito SyedRehan Iftikhar Bukhari Zsolt Radak Research Center of Molecular Exercise Science University of Physical EducationBudapestHungary Department of Medical Chemistry Faculty of MedicineUniversity of DebrecenHungary Department of Exercise Physiology Graduate School of Health and Sports Science&MedicineJuntendo UniversityJapan Doctoral School of Clinical Medicine Semmelweis UniversityBudapestHungary Faculty of Sport Sciences Waseda UniversityJapan

Blood flow restriction(BFR)during exercise bouts has been used to induce hypertrophy of skeletal muscle,even with low ***,the effects of BFR during the rest periods between sets are not *** have tested the hypothesis that BFR during rest periods between sets of high-intensity resistance training would enhance ***-two young adult male university students were recruited for the current study,with n=11 assigned to BFR and n=11 to a control *** results revealed that four weeks training at 70%of 1 RM,five sets and 10 repetitions,three times a week with and without BFR,resulted in similar progress in maximal strength and in the number of maximal *** miR-1 and miR-133a decreased significantly in the vastus lateralis muscle of BFR group compared to the group without BFR,while no significant differences in the levels of miR133b,miR206,miR486,and miR499 were found between *** conclusion,it seems that BFR restrictions during rest periods of high-intensity resistance training,do not provide benefit for enhanced performance after a four-week training ***,BFR-induced downregulation of miR-1 and miR-133a might cause different adaptive responses of skeletal muscle to high intensity resistance training.

关键词： Blood flow restriction Occlusion Skeletal muscle High intensity resistance training microRNA

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