Maximal pulmonary ventilation and lactate affect the anaerobic performance in young women exposed to hypobaric hypoxia

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dc.contributor.authorPaez, Valeria
dc.contributor.authorRodriguez-Fernandez, Maria
dc.contributor.authorSilva-Urra, Juan
dc.contributor.authorNunez-Espinosa, Cristian
dc.contributor.authorLang, Morin
dc.date.accessioned2025-01-20T20:16:48Z
dc.date.available2025-01-20T20:16:48Z
dc.date.issued2023
dc.description.abstractBackground: Athletes, tourists, and mining workers from all over the world ascend daily to an altitude greater than 3.000 meters above sea level to perform different activities, all of which demand physical effort. A ventilation increase is the first mechanism once the chemoreceptors perceive hypoxia, and is key to maintaining blood oxygen levels during acute exposure to high altitudes and to buffering lactic acidosis during exercise. It has been observed that gender is a variable that can influence the ventilatory response. Still, the available literature is limited due to the few studies considering women as study subjects. The influence of gender on anaerobic performance and its effects under high altitudes (HA) environments have been poorly studied.
dc.description.abstractObjective: The objectives of this study were to evaluate anaerobic performance in young women exposed to high altitudes and to compare the physiological response to multiple sprints between women and men measured by ergospirometry.
dc.description.abstractMethodology: Nine women and nine men (22.9 +/- 3.2 years old) carried out the multiple-sprint anaerobic tests under two conditions, sea level and high altitudes.
dc.description.abstractResults: In the first 24 h of exposure to a high altitudes, lactate levels were higher in women than those in men (2.57 +/- 0.4 Mmol/L, 2.18 +/- 0.3 Mmol/L, respectively; p < 0.05). Second, women had a decreased ventilatory response in exposure to high altitudes compared to men (p > 0.005). Third, there is a positive correlation between lactate levels prior to an anaerobic test and the ventilatory response developed by subjects at high altitudes (R2 = 0.33, slope = -41.7, and p < 0.05). Lastly, this ventilatory response can influence VO2peak (R2 = 0.60, slope = 0.02, and p < 0.001).
dc.description.abstractConclusion: This study provides insights into the mechanisms behind the reduced respiratory capacity observed in women during an anaerobic exercise test at high altitudes. An acute response to HA showed a greater work of breathing and increased the drive ventilatory response. It is possible to postulate the differences in the fatigue-induced metaboreflex of the respiratory muscles and aerobic-anaerobic transition between genders. These results on multiple sprint performance and the influences of gender in hypoxic environments deserve further investigation.
dc.fuente.origenWOS
dc.identifier.doi10.3389/fphys.2023.1110477
dc.identifier.eissn1664-042X
dc.identifier.urihttps://doi.org/10.3389/fphys.2023.1110477
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92355
dc.identifier.wosidWOS:000945297800001
dc.language.isoen
dc.revistaFrontiers in physiology
dc.rightsacceso restringido
dc.subjecthigh altitudes
dc.subjecthypoxia
dc.subjectexercise
dc.subjectmultiple-sprint performance
dc.subjectlactate
dc.subjectanaerobic test
dc.subjectpulmonary ventilation
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleMaximal pulmonary ventilation and lactate affect the anaerobic performance in young women exposed to hypobaric hypoxia
dc.typeartículo
dc.volumen14
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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