The Effect of Hyperoxia on Central and Peripheral Factors of Arm Flexor Muscles Fatigue Following Maximal Ergometer Rowing in Men

This study evaluates the effect of hyperoxia on cerebral oxygenation and neuromuscular fatigue mechanisms of the elbow flexor muscles following ergometer rowing. In 11 competitive male rowers (age, 30 ± 4 years), we measured near-infrared spectroscopy determined frontal lobe oxygenation (ScO ) and t...

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Bibliographic Details
Published in:Frontiers in physiology 2022-02, Vol.13, p.829097-829097
Main Authors: Volianitis, Stefanos, Rasmussen, Peter, Petersen, Nicolas C, Secher, Niels H
Format: Article
Language:English
Subjects:
cerebral oxygenation
hyperoxia
maximal voluntary contraction
Physiology
rowing
transcranial magnetic stimulation
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Summary:This study evaluates the effect of hyperoxia on cerebral oxygenation and neuromuscular fatigue mechanisms of the elbow flexor muscles following ergometer rowing. In 11 competitive male rowers (age, 30 ± 4 years), we measured near-infrared spectroscopy determined frontal lobe oxygenation (ScO ) and transcranial Doppler ultrasound determined middle cerebral artery mean flow velocity (MCA ) combined with maximal voluntary force (MVC), peak resting twitch force ( ) and cortical voluntary activation (VA ) of the elbow flexor muscles using electrical motor point and magnetic motor cortex stimulation, respectively, before, during, and immediately after 2,000 m all-out effort on rowing ergometer with normoxia and hyperoxia (30% O ). Arterial hemoglobin O saturation was reduced to 92.5 ± 0.2% during exercise with normoxia but maintained at 98.9 ± 0.2% with hyperoxia. The MCA increased by 38% (  
ISSN:1664-042X
1664-042X
DOI:10.3389/fphys.2022.829097