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2021-10-01

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cc-by (c) Espinosa-Ramírez, Maximiliano et al., 2021
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/184773

Sex-differences in the oxygenation levels of intercostales and vastus lateralis muscles during incremental exercise

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Recurs relacionat

https://doi.org/10.3389/fphys.2021.738063

Resum

This 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 [V ̇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 V ̇E (L·min-1) (p<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.

Matèries

Exercici, Diferències entre sexes, Músculs respiratoris

Matèries (anglès)

Exercise, Sex differences, Respiratory muscles

Citació

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Articles publicats en revistes (Biologia Cel·lular, Fisiologia i Immunologia)

Citació

ESPINOSA-RAMÍREZ, Maximiliano, et al. Sex-differences in the oxygenation levels of intercostales and vastus lateralis muscles during incremental exercise. Frontiers in Physiology. 2021. Vol. 12, num. e738063, pags. 1-11. ISSN 1664-042X. [consulted: 3 of August of 2026]. Available at: https://hdl.handle.net/2445/184773

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