Intercostal muscles oxygenation and breathing pattern during exercise in competitive marathon runners

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dc.coverageDOI: 10.3390/ijerph18168287
dc.creatorContreras-Briceño, Felipe
dc.creatorEspinosa-Ramírez, Maximiliano
dc.creatorMoya-Gallardo, Eduardo
dc.creatorFuentes-Kloss, Rodrigo
dc.creatorGabrielli, Luigi
dc.creatorAraneda, Oscar F.
dc.creatorViscor, Ginés
dc.date2021
dc.date.accessioned2025-11-18T19:54:06Z
dc.date.available2025-11-18T19:54:06Z
dc.description<p>The study aimed to evaluate the association between the changes in ventilatory variables (tidal volume (Vt), respiratory rate (RR) and lung ventilation (<sup>.</sup>VE)) and deoxygenation of m.intescostales (∆SmO<sub>2</sub>-m.intercostales) during a maximal incremental exercise in 19 male high-level competitive marathon runners. The ventilatory variables and oxygen consumption (<sup>.</sup>VO<sub>2</sub> ) were recorded breath-by-breath by exhaled gas analysis. A near-infrared spectroscopy device (MOXY®) located in the right-hemithorax allowed the recording of SmO<sub>2</sub>-m.intercostales. To explore changes in oxygen levels in muscles with high demand during exercise, a second MOXY® records SmO<sub>2</sub>-m.vastus laterallis. The triphasic model of exercise intensity was used for evaluating changes in SmO<sub>2</sub> in both muscle groups. We found that ∆SmO<sub>2</sub>-m.intercostales correlated with<sup>.</sup>VO<sub>2-peak</sub> (r = 0.65; p = 0.002) and the increase of<sup>.</sup>VE (r = 0.78; p = 0.001), RR (r = 0.54; p = 0.001), but not Vt (p = 0.210). The interaction of factors (muscles × exercise-phases) in SmO<sub>2</sub> expressed as an arbitrary unit (a.u) was significant (p = 0.005). At VT1 there was no difference (p = 0.177), but SmO<sub>2</sub>-m.intercostales was higher at VT2 (p &lt; 0.001) and<sup>.</sup>VO<sub>2-peak</sub> (p &lt; 0.001). In high-level competitive marathon runners, the m.intercostales deoxygenation during incremental exercise is directly associated with the aerobic capacity and increased lung ventilation and respiratory rate, but not tidal volume. Moreover, it shows less deoxygenation than m.vastus laterallis at intensities above the aerobic ventilatory threshold.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/c7de694f-4c03-4c91-a84c-c201182263b5
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/58588
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourcevol.18 (2021) date: 2021-08-02 nr.16
dc.subjectExercise Test
dc.subjectHumans
dc.subjectIntercostal Muscles
dc.subjectLung
dc.subjectMale
dc.subjectMarathon Running
dc.subjectMuscle, Skeletal/metabolism
dc.subjectOxygen Consumption
dc.subjectRespiration
dc.titleIntercostal muscles oxygenation and breathing pattern during exercise in competitive marathon runnerseng
dc.typeArticleeng
dc.typeArtículospa
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