Why do Athletes Develop Very Severe or Fatal Forms of COVID after Intense Exercise Following SARS-CoV-2 Infection or Anti-COVID Vaccination?

Infectious Disorders - Drug Targets, Journal Year: 2023, Volume and Issue: 23(4)

Published: Jan. 12, 2023

Language: Английский

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Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists

Sports, Journal Year: 2023, Volume and Issue: 11(2), P. 22 - 22

Published: Jan. 18, 2023

The aim of this study was to determine if quadriceps morphology [muscle volume (MV); cross-sectional area (CSA)], vastus lateralis (VL) muscle architecture, and quality [echo intensity (ECHO)] can explain differences in knee extensor maximal voluntary isometric contraction (MVIC), crank torque (CT) time-to-exhaustion (TTE) trained cyclists. Twenty male competitive cyclists performed a incremental ramp their power output (POMAX). Muscle (MV; CSA), architecture VL (ECHO) both muscles were assessed. Subsequently, three MVICs finally TTE test at POMAX with CT measurement during TTE. Stepwise multiple regression results revealed right MV determined MVIC (31%) (33%). Left (24%); left fascicle length (VL-FL) (64%). However, morphological variables do not No significant observed between (p > 0.05). findings emphasize that is an important determinant but does POMAX. Furthermore, similar the

Language: Английский

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Agreement between Ventilatory Thresholds and Bilaterally Measured Vastus Lateralis Muscle Oxygen Saturation Breakpoints in Trained Cyclists: Effects of Age and Performance

Sports, Journal Year: 2024, Volume and Issue: 12(2), P. 40 - 40

Published: Jan. 28, 2024

This study focused on comparing metabolic thresholds derived from local muscle oxygen saturation (SmO2) signals, obtained using near-infrared spectroscopy (NIRS), with global pulmonary ventilation rates measured at the mouth. It was conducted among various Age Groups within a well-trained cyclist population. Additionally, examined how cycling performance characteristics impact discrepancies between ventilatory (VTs) and SmO2 breakpoints (BPs). Methods: Junior (n = 18) Senior 15) cyclists underwent incremental tests to assess their aerobic determine (AeT) anaerobic (AnT) threshold through gas exchange changes in linearity of vastus lateralis (VL) signals. We compared relative power (Pkg) (BPs) for nondominant (ND), dominant (DO), bilaterally averaged (Avr) during agreement analysis. 30 s sprint test performed estimate capabilities cyclists’ phenotype, defined as ratio P@VT2 highest 5 power. Results: The Pkg@BP Avr had higher VT values than ND DO. Pkg@BP1 lower (p < 0.05) Pkg@VT1 (mean bias: 0.12 ± 0.29 W/kg; Limits Agreement (LOA): −0.45 0.68 R2 0.72) mainly Seniors (0.21 0.22 LOA: −0.22 0.63 W/kg); there no difference > Pkg@BP2 Pkg@VT2 (0.03 −0.40 0.45 0.86). bias two methods correlated significantly phenotype (r −0.385 r −0.515 AeT AnT, respectively). Conclusions: Two can be NIRS-captured signal VL, but individual level too low interchangeable usage those practical training process. Older generally exhibited earlier oxygenation signals systemic responses, unlike younger who showed greater variability significant differences this regard evaluation methods. More sprinter-type tended have NIRS-derived athletes relatively abilities.

Language: Английский

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Effects of chronic alcohol intoxication on aerobic exercise-induced adaptations in female mice

Journal of Applied Physiology, Journal Year: 2024, Volume and Issue: 136(4), P. 721 - 738

Published: Feb. 15, 2024

Chronic alcohol intoxication decreases muscle strength/function and causes mitochondrial dysfunction. Aerobic exercise training improves oxidative capacity increases mass strength. Presently, the impact of chronic on aerobic exercise-induced adaptations was investigated. Female C57BL/6Hsd mice were randomly assigned to one four groups: control sedentary (CON SED;

Language: Английский

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Themes and trends in marathon performance research: a comprehensive bibliometric analysis from 2009 to 2023

Frontiers in Physiology, Journal Year: 2024, Volume and Issue: 15

Published: May 10, 2024

Background: When marathon runners break the 2-h barrier at finishing line, it attracts global attention. This study is aimed to conduct a bibliometric analysis of publications in field running, analyze relevant research contributors, and visualize historical trends performance over past 15 years. Methods: On 8 December 2023, we extracted high-quality publication data from Web Science Core Collection spanning 1 January 2009 30 November 2023. We conducted history visualization using R language packages biblioshiny, VOSviewer, CiteSpace. Results: A total 1,057 studies were published by 3,947 authors 1,566 institutions across 63 countries/regions. USA has highest citation volume, while, University Zurich being most prolific institution. Keywords revealed several hotspots 3 years: (1) physiology elite runners, (2) training intensity pacing strategies, (3) nutritional strategies for (4) age sex differences performance, (5) recovery inflammatory response muscle damage. Conclusion: presents first comprehensive It unveils key contributors research, visually represents developments field, highlights recent topical frontiers. The findings this will guide future identifying potential

Language: Английский

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