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Full-Text Articles in Systems and Integrative Physiology

Regulation Of Skeletal Muscle Plasticity By The Gut Microbiome, Taylor R. Valentino Jan 2022

Regulation Of Skeletal Muscle Plasticity By The Gut Microbiome, Taylor R. Valentino

Theses and Dissertations--Physiology

Recent evidence suggests that the gut microbiome could play a role in skeletal muscle plasticity, providing novel treatments for muscle wasting diseases and/or performance enhancements. I first sought to determine if the gut microbiome is necessary for skeletal muscle adaptation to exercise. Forty-two, four-month old, female C57Bl/6J underwent nine weeks of weighted wheel running or remained in cage with a locked wheel, without or without the administration of antibiotics (treated). In response to wheel running, I found that antibiotic depletion of the microbiome led to a blunted hypertrophic response in the soleus muscle as measured by normalized muscle wet weight …


To Flex Or Rest: Does Adding No-Load Isometric Actions To The Inter-Set Rest Period In Resistance Training Enhance Muscular Adaptations? A Randomized-Controlled Trial, Brad J. Schoenfeld, Jozo Grgic, Bret Contreras, Kenneth Delcastillo, Andrew Alto, Cody Haun, Eduardo O. De Souza, Andrew D. Vigotsky Jan 2020

To Flex Or Rest: Does Adding No-Load Isometric Actions To The Inter-Set Rest Period In Resistance Training Enhance Muscular Adaptations? A Randomized-Controlled Trial, Brad J. Schoenfeld, Jozo Grgic, Bret Contreras, Kenneth Delcastillo, Andrew Alto, Cody Haun, Eduardo O. De Souza, Andrew D. Vigotsky

Publications and Research

We aimed to investigate the effects of resistance training (RT) combined with no-load isometric actions (iso-holds) during the inter-set recovery period versus RT that involves passive inter-set rest on muscular strength, muscular hypertrophy, and muscular endurance in resistance-trained men. Twenty-seven resistance-trained male volunteers were randomly assigned to either a traditional group (TRAD) that performed a hypertrophy-oriented RT routine with the rest intervals spent passively (n = 13) or to a group that supplemented traditional RT with iso-holds (ISO) for the working muscle group between each set (n = 14). Training for both routines consisted of three weekly sessions performed for …


Similar Muscular Adaptations In Resistance Training Performed Two Versus Three Days Per Week, Thiago Lasevicius, Brad Jon Schoenfeld, Jozo Grgic, Gilberto Laurentino, Lucas Duarte Tavares, Valmor Tricoli Aug 2019

Similar Muscular Adaptations In Resistance Training Performed Two Versus Three Days Per Week, Thiago Lasevicius, Brad Jon Schoenfeld, Jozo Grgic, Gilberto Laurentino, Lucas Duarte Tavares, Valmor Tricoli

Publications and Research

The purpose of the present study was to compare changes in muscle strength and hypertrophy between volume-equated resistance training (RT) performed 2 versus 3 times per week in trained men. Thirty-six resistance-trained men were randomly assigned to one of the two experimental groups: a split-body training routine (SPLIT) with muscle groups trained twice per week (n = 18) over four weekly sessions, or a total-body routine (TOTAL), with muscle groups being trained three times per week (n = 18) over three weekly sessions. The training intervention lasted 10 weeks. Testing was carried out pre- and post-study to assess maximal muscular …


Induction Of Autophagy Markers Is Associated With Attenuation Of Mir-133a In Diabetic Heart Failure Patients Undergoing Mechanical Unloading., Shyam Sundar Nandi, Michael J. Duryee, Hamid R. Shahshahan, Geoffrey M. Thiele, Daniel R. Anderson, Paras K. Mishra Apr 2015

Induction Of Autophagy Markers Is Associated With Attenuation Of Mir-133a In Diabetic Heart Failure Patients Undergoing Mechanical Unloading., Shyam Sundar Nandi, Michael J. Duryee, Hamid R. Shahshahan, Geoffrey M. Thiele, Daniel R. Anderson, Paras K. Mishra

Journal Articles: Cellular & Integrative Physiology

Autophagy is ubiquitous in all forms of heart failure and cardioprotective miR-133a is attenuated in human heart failure. Previous reports from heart failure patients undergoing left ventricular assist device (LVAD) implantation demonstrated that autophagy is upregulated in the LV of the failing human heart. Studies in the murine model show that diabetes downregulates miR-133a. However, the role of miR-133a in the regulation of autophagy in diabetic hearts is unclear. We tested the hypothesis that diabetes exacerbates cardiac autophagy by inhibiting miR-133a in heart failure patients undergoing LVAD implantation. The miRNA assay was performed on the LV of 15 diabetic (D) …