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Article

Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners

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Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile
2
Physiology Section, Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
3
Advanced Center for Chronic Diseases (ACCDiS), Division of Cardiovascular Diseases, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Sergio Livingstone 1007, Santiago 8380000, Chile
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Laboratory of Integrative Physiology of Biomechanics and Physiology of Effort (LIBFE), Kinesiology School, Faculty of Medicine, Universidad de los Andes, Av. Monseñor Alvaro del Portillo 12455, Santiago 7620001, Chile
*
Author to whom correspondence should be addressed.
Academic Editors: Óscar García García and Virginia Serrano Gomez
Int. J. Environ. Res. Public Health 2021, 18(16), 8287; https://doi.org/10.3390/ijerph18168287
Received: 24 June 2021 / Revised: 30 July 2021 / Accepted: 3 August 2021 / Published: 5 August 2021
The study aimed to evaluate the association between the changes in ventilatory variables (tidal volume (Vt), respiratory rate (RR) and lung ventilation (V.E)) and deoxygenation of m.intescostales (∆SmO2-m.intercostales) during a maximal incremental exercise in 19 male high-level competitive marathon runners. The ventilatory variables and oxygen consumption (V.O2) were recorded breath-by-breath by exhaled gas analysis. A near-infrared spectroscopy device (MOXY®) located in the right-hemithorax allowed the recording of SmO2-m.intercostales. To explore changes in oxygen levels in muscles with high demand during exercise, a second MOXY® records SmO2-m.vastus laterallis. The triphasic model of exercise intensity was used for evaluating changes in SmO2 in both muscle groups. We found that ∆SmO2-m.intercostales correlated with V.O2-peak (r = 0.65; p = 0.002) and the increase of V.E (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 SmO2 expressed as an arbitrary unit (a.u) was significant (p = 0.005). At VT1 there was no difference (p = 0.177), but SmO2-m.intercostales was higher at VT2 (p < 0.001) and V.O2-peak (p < 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. View Full-Text
Keywords: exercise; runners; near-infrared spectroscopy; respiratory muscles; respiration exercise; runners; near-infrared spectroscopy; respiratory muscles; respiration
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MDPI and ACS Style

Contreras-Briceño, F.; Espinosa-Ramírez, M.; Moya-Gallardo, E.; Fuentes-Kloss, R.; Gabrielli, L.; Araneda, O.F.; Viscor, G. Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners. Int. J. Environ. Res. Public Health 2021, 18, 8287. https://doi.org/10.3390/ijerph18168287

AMA Style

Contreras-Briceño F, Espinosa-Ramírez M, Moya-Gallardo E, Fuentes-Kloss R, Gabrielli L, Araneda OF, Viscor G. Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners. International Journal of Environmental Research and Public Health. 2021; 18(16):8287. https://doi.org/10.3390/ijerph18168287

Chicago/Turabian Style

Contreras-Briceño, Felipe, Maximiliano Espinosa-Ramírez, Eduardo Moya-Gallardo, Rodrigo Fuentes-Kloss, Luigi Gabrielli, Oscar F. Araneda, and Ginés Viscor. 2021. "Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners" International Journal of Environmental Research and Public Health 18, no. 16: 8287. https://doi.org/10.3390/ijerph18168287

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