muscle

Patients with chronic fatigue syndrome performed worse than controls in a controlled repeated exercise study despite a normal oxidative phosphorylation capacity Vermeulen, Ruud CW; Kurk, Ruud M; Visser, Frans C; Sluiter, Wim; Scholte, Hans R Background The aim of this study was to investigate...

Maximal oxidative capacity during exercise is associated with muscle power output in patients with long coronavirus disease 2019 COVID-19 syndrome. A moderation analysis Robinson Ramírez-Vélez; Sergio Oscoz-Ochandorena; Yesenia García-Alonso; Nora García-Alonso; Gaizka Legarra-Gorgoñon; Julio...

Introduction Monitoring muscle metabolic activity via blood lactate is a useful tool for understanding the physiological response to a given exercise intensity. Recent indications suggest that skeletal muscle oxygen saturation (SmO2), an index of the balance between local O2 supply and demand...

Link to post on published version Internal tremors and vibrations in long COVID: a cross-sectional study Tianna Zhou; Mitsuaki Sawano; Adith S. Arun; César Caraballo; Teresa Michelsen; Lindsay McAlpine; Bornali Bhattacharjee; Yuan Lu; Rohan Khera; Chenxi Huang; Frederick Warner; Akiko Iwasaki...

"We found that metformin-treated individuals had less type-I myofiber atrophy during disuse, reduced pro-inflammatory transcriptional profiles, and lower muscle collagen deposition during recovery. Collagen content and myofiber size corresponded to reduced whole muscle cellular senescence and...

Structural and functional impairments of skeletal muscle in patients with post-acute sequelae of SARS-CoV-2 infection Marta Colosio ; Lorenza Brocca ; Marco Gatti ; Marianna Neri ; Emanuela Crea ; Francesca Cadile ; Monica Canepari ; Maria Antonietta Pellegrino ; Biagio Polla ; Simone...

Muscle Abnormalities Contribute to Post-Exertional Malaise in Long COVID A poster presentation of the very soon to be published work by Rob Wüsts team has been uploaded to Twitter. Paper now published, see post #8

Abstract Healthy skeletal muscle can regenerate after ischaemic, mechanical, or toxin-induced injury, but ageing impairs that regeneration potential. This has been largely attributed to dysfunctional satellite cells and reduced myogenic capacity. Understanding which signalling pathways are...

Highlights • Does force failure result from sarcolemma fatigue in Myalgic Encephalomyelitis patients? • Two groups of Myalgic Encephalomyelitis patients with or not M wave alterations were compared. • Maximal handgrip strength and M wave in forearm muscle were simultaneously measured. •...

A coordinated multiorgan metabolic response contributes to human mitochondrial myopathy Nneka Southwell; Guido Primiano; Viraj Nadkarni; Nabeel Attarwala; Emelie Beattie; Dawson Miller; Sumaitaah Alam; Irene Liparulo; Yevgeniya I Shurubor; Maria Lucia Valentino; Valerio Carelli; Serenella...

Myopathy as a cause of Long COVID fatigue: Evidence from quantitative and single fiber EMG and muscle histopathology Highlights Myopathic changes in qEMG and/or increased jitter in sfEMG were seen in 63% of 84 patients with Long COVID neuromuscularsymptoms. Low quality of life score correlated...

I randomly came across an article on McArdle disease (a genetic disorder that mainly affects skeletal muscles), and found the description of exertion intolerance both interesting and relatable. Does anyone here know if there has been any scientific attempts to compare the exertion intolerance...

Loss of Skeletal Muscle Pyruvate Dehydrogenase Induces Lactic Acidosis and Adaptive Anaplerotic Compensation via Pyruvate-Alanine Cycling and Glutaminolysis Keshav Gopal; Abdualrahman Mohammed Abdualkader; Xiaobei Li; Amanda A. Greenwell; Qutuba G. Karwi; Christina Saed; Golam M. Uddin; Ahmed M...

Highlights Muscle injury induces local accumulation of RORγ+ Treg cells emanating from the gut The microbiota regulates muscle repair via RORγ+ Treg cells Muscle RORγ+ Treg cells shield differentiating muscle stem cells from IL-17A RORγ+ Treg cell emissaries play a general role in the...

Abstract During maximal exercise healthy humans increase their oxygen uptake (V̇O2) 10 to 20-fold that measured at rest to as much as 6 L/min. At the molecular level the numbers are staggering: Each minute the exercising O2 transport system - lungs, cardiovascular and active muscles – must...

Serum GDF-15 Levels Accurately Differentiate Patients with Primary Mitochondrial Myopathy, Manifesting with Exercise Intolerance and Fatigue, from Patients with Chronic Fatigue Syndrome Authors from the Neuromuscular Disorders Unit of the Hospital Universitario 12 de Octubre in Madrid (national...

Precision MRI phenotyping of muscle volume and quality at a population scale Marjola Thanaj, Nicolas Basty, Brandon Whitcher, Elena P Sorokin, Yi Liu, Ramprakash Srinivasan, Madeleine Cule, Elizabeth Louise Thomas, Jimmy David Bell Background: Magnetic resonance imaging (MRI) enables direct...

Now published - see post Preprint Post-COVID syndrome is associated with capillary alterations, macrophage infiltration and distinct transcriptomic signatures in skeletal muscles Tom Aschman, Emanuel Wyler, Oliver Baum, Andreas Hentschel, Franziska Legler, Corinna Preusse, Lil Meyer-Arndt...

Abstract Background Muscle fatigue and pain are key symptoms of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS). Although the pathophysiology is not yet fully understood, there is ample evidence for hypoperfusion which may result in electrolyte imbalance and sodium overload in...

Abstract Background Patients with long-COVID often complain of continuous fatigue, myalgia, sleep problems, cognitive dysfunction, and post-exertional malaise. No data are available on EMG recording of evoked myopotentials (M-waves) or exercise-induced alterations in long-COVID patients...