Sex-Differences in the Oxygenation Levels of Intercostal and Vastus Lateralis Muscles During Incremental Exercise

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dc.coverageDOI: 10.3389/fphys.2021.738063
dc.creatorEspinosa-Ramírez, Maximiliano
dc.creatorMoya-Gallardo, Eduardo
dc.creatorAraya-Román, Felipe
dc.creatorRiquelme-Sánchez, Santiago
dc.creatorRodriguez-García, Guido
dc.creatorReid, W. Darlene
dc.creatorViscor, Ginés
dc.creatorAraneda, Oscar F.
dc.creatorGabrielli, Luigi
dc.creatorContreras-Briceño, Felipe
dc.date2021
dc.date.accessioned2025-11-18T19:54:17Z
dc.date.available2025-11-18T19:54:17Z
dc.description<p>This study aimed to examine sex differences in oxygen saturation in respiratory (SmO<sub>2</sub>-m.intercostales) and locomotor muscles (SmO<sub>2</sub>-m.vastus lateralis) while performing physical exercise. Twenty-five (12 women) healthy and physically active participants were evaluated during an incremental test with a cycle ergometer, while ventilatory variables [lung ventilation ((Formula presented.) E), tidal volume (Vt), and respiratory rate (RR)] were acquired through the breath-by-breath method. SmO<sub>2</sub> was acquired using the MOXY<sup>®</sup> devices on the m.intercostales and m.vastus lateralis. A two-way ANOVA (sex × time) indicated that women showed a greater significant decrease of SmO<sub>2</sub>-m.intercostales, and men showed a greater significant decrease of SmO<sub>2</sub>-m.vastus lateralis. Additionally, women reached a higher level of ΔSmO<sub>2</sub>-m.intercostales normalized to (Formula presented.) E (L⋅min<sup>–1</sup>) (p &lt; 0.001), whereas men had a higher level of ΔSmO<sub>2</sub>-m.vastus lateralis normalized to peak workload-to-weight (watts⋅kg<sup>–1</sup>, PtW) (p = 0.049), as confirmed by Student’s t-test. During an incremental physical exercise, women experienced a greater cost of breathing, reflected by greater deoxygenation of the respiratory muscles, whereas men had a higher peripheral load, indicated by greater deoxygenation of the locomotor muscles.</p>eng
dc.descriptionThis study aimed to examine sex differences in oxygen saturation in respiratory (SmO2-m.intercostales) and locomotor muscles (SmO2-m.vastus lateralis) while performing physical exercise. Twenty-five (12 women) healthy and physically active participants were evaluated during an incremental test with a cycle ergometer, while ventilatory variables [lung ventilation ((Formula presented.) E), tidal volume (Vt), and respiratory rate (RR)] were acquired through the breath-by-breath method. SmO2 was acquired using the MOXY® devices on the m.intercostales and m.vastus lateralis. A two-way ANOVA (sex × time) indicated that women showed a greater significant decrease of SmO2-m.intercostales, and men showed a greater significant decrease of SmO2-m.vastus lateralis. Additionally, women reached a higher level of ΔSmO2-m.intercostales normalized to (Formula presented.) E (L⋅min–1) (p &lt; 0.001), whereas men had a higher level of ΔSmO2-m.vastus lateralis normalized to peak workload-to-weight (watts⋅kg–1, PtW) (p = 0.049), as confirmed by Student’s t-test. During an incremental physical exercise, women experienced a greater cost of breathing, reflected by greater deoxygenation of the respiratory muscles, whereas men had a higher peripheral load, indicated by greater deoxygenation of the locomotor muscles. © Copyright © 2021 Espinosa-Ramírez, Moya-Gallardo, Araya-Román, Riquelme-Sánchez, Rodriguez-García, Reid, Viscor, Araneda, Gabrielli and Contreras-Briceño.spa
dc.identifierhttps://investigadores.uandes.cl/en/publications/49d709b3-70ee-4a25-abcd-43da139623e0
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/58681
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourcevol.12 (2021) date: 2021-10-01 p.738063
dc.subjectcost of breathing
dc.subjectexercise
dc.subjectnear-infrared spectroscopy
dc.subjectrespiratory muscles
dc.subjectsex
dc.titleSex-Differences in the Oxygenation Levels of Intercostal and Vastus Lateralis Muscles During Incremental Exerciseeng
dc.typeArticleeng
dc.typeArtículospa
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