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ventilation
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Sex differences in respiratory and circulatory cost during hypoxic ... nature.com Jul 2, 2019 7 facts
measurementVentilatory costs are approximately 1 Watt for every 1.8 L min−1 increment in ventilation (VE) for men, and 1 Watt for every 1.6 L min−1 increment in ventilation (VE) for women.
measurementThe relative contributions of energy expenditure (EE), ventilation (VE), and heart rate (HR) to the change in oxygen saturation (ΔSpO2) under hypoxic conditions differ by sex: in women, the effects of EE (28.1% vs 15.8% in men) and VE (4.1% vs 1.7% in men) were greater, while in men, the contribution of HR was greater (82.5% vs 67.9% in women).
claimDuring hypoxic walking, changes in energy expenditure (ΔEE) and ventilation (ΔVE) increased with speed in both men and women, with men exhibiting higher values than women at the fastest walking speed.
referenceDominelli and colleagues found that oxygen uptake of the respiratory muscles, such as the thoracic diaphragm and intercostal muscles, was significantly greater in women than in men at ventilation rates greater than 55 L min−1 during exercise.
referenceHoriuchi et al. (2017) published a study in Scientific Reports titled 'Measuring the Energy of Ventilation and Circulation during Human Walking using Induced Hypoxia'.
procedureHypoxia-induced changes in energy expenditure (ΔEE), ventilation (ΔVE), and heart rate (ΔHR) are calculated by subtracting normoxic values from hypoxic values at the same walking speed, with calculations performed separately for men and women.
claimThe study hypothesized that women would experience greater arterial hypoxemia than men, and that the contribution rates of energy expenditure, ventilation, and heart rate in response to changes in oxygen saturation would differ between the sexes.
Sex differences in cardiorespiratory control under hypoxia - Frontiers frontiersin.org Jan 30, 2025 5 facts
claimExposure to iso-saturation hypoxia causes increases in heart rate, cardiac output, low-frequency bands of R-R intervals, blood pressure, tidal volume, and ventilation, while causing decreases in baroreflex sensitivity, total power, and the high-frequency band of R-R intervals.
claimWhen analyzing sex as a factor in iso-saturation hypoxia, females exhibit a higher heart rate and cardiac output index, but lower tidal volume, ventilation, and low-frequency band of blood pressure compared to males.
claimUnder iso-time hypoxia, females exhibit higher heart rates, cardiac output, and total vascular conductance, while males exhibit higher tidal volume, ventilation, and low-frequency bands of blood pressure.
claimCamacho-Cardenosa et al. (36) demonstrated that during 7 hours of moderate normobaric hypoxia, ventilation increased in both males and females, but the increase was significantly greater in males.
claimIn the current investigation, females did not change ventilation in response to hypoxia in either iso-saturation or iso-time segment analyses.
Sex differences in the cardiopulmonary and neuromuscular ... biorxiv.org Nov 11, 2024 3 facts
measurementVentilation relative to oxygen uptake (E/VO2) showed no main effect of sex (p = 0.317), but a sex × time interaction effect (p = 0.005), with females showing greater values than males during the first interval (p = 0.034).
measurementWhen ventilation (E) was expressed as a percentage of peak values, there was no main effect of sex (p = 0.187), but a sex × time interaction effect was observed (p = 0.042).
measurementFemales exhibited greater ventilation (VE), ventilation/oxygen uptake (VE/VO2), and ventilation/carbon dioxide production (VE/VCO2) values during the first two intervals of the exercise task (p≤0.046).
Sex differences in respiratory function - ERS Publications publications.ersnet.org 1 fact
claimHormonal differences across the menstrual cycle impact ventilation at rest but do not impact ventilation during exercise.
The New Field of Network Physiology: Building the Human ... frontiersin.org 1 fact
claimHeartbeat is synchronized with ventilation, as demonstrated in a 1998 study by Schäfer et al. published in Nature.