TY - JOUR
T1 - Sex-Differences in the Oxygenation Levels of Intercostal and Vastus Lateralis Muscles During Incremental Exercise
AU - Espinosa-Ramírez, Maximiliano
AU - Moya-Gallardo, Eduardo
AU - Araya-Román, Felipe
AU - Riquelme-Sánchez, Santiago
AU - Rodriguez-García, Guido
AU - Reid, W. Darlene
AU - Viscor, Ginés
AU - Araneda, Oscar F.
AU - Gabrielli, Luigi
AU - Contreras-Briceño, Felipe
N1 - Publisher Copyright:
© Copyright © 2021 Espinosa-Ramírez, Moya-Gallardo, Araya-Román, Riquelme-Sánchez, Rodriguez-García, Reid, Viscor, Araneda, Gabrielli and Contreras-Briceño.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - 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 ((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 < 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.
AB - 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 ((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 < 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.
KW - cost of breathing
KW - exercise
KW - near-infrared spectroscopy
KW - respiratory muscles
KW - sex
UR - http://www.scopus.com/inward/record.url?scp=85117153783&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/acebcc22-fc35-32cb-8528-cae826964db8/
U2 - 10.3389/fphys.2021.738063
DO - 10.3389/fphys.2021.738063
M3 - Article
C2 - 34658921
AN - SCOPUS:85117153783
SN - 1664-042X
VL - 12
SP - 738063
JO - Frontiers in Physiology
JF - Frontiers in Physiology
M1 - 738063
ER -