AI Article Synopsis
- The study investigated how oxygen saturation levels differ between men and women during exercise, focusing on both respiratory and locomotor muscles.
- Women experienced a more significant drop in oxygen saturation in respiratory muscles during physical activity, while men showed a greater decrease in locomotor muscle oxygen saturation.
- The findings suggest that women face a higher cost of breathing during exercise, whereas men deal with a larger peripheral load.
Article Abstract
This study aimed to examine sex differences in oxygen saturation in respiratory (SmO-) and locomotor muscles (SmO-) 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 ( E), tidal volume (Vt), and respiratory rate (RR)] were acquired through the breath-by-breath method. SmO was acquired using the MOXY devices on the and . A two-way ANOVA (sex × time) indicated that women showed a greater significant decrease of SmO-, and men showed a greater significant decrease of SmO-. Additionally, women reached a higher level of ΔSmO- normalized to E (L⋅min) ( < 0.001), whereas men had a higher level of ΔSmO- normalized to peak workload-to-weight (watts⋅kg, PtW) ( = 0.049), as confirmed by Student's -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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8517227 | PMC |
| http://dx.doi.org/10.3389/fphys.2021.738063 | DOI Listing |
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