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minute ventilation
Also known as: E, V̇E, ΔVE, ΔV̇E
Facts (24)
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Sex differences in respiratory and circulatory cost during hypoxic ... nature.com Jul 2, 2019 16 facts
measurementThe model fit for predicting oxygen saturation change (ΔSpO2) based on energy expenditure (ΔEE), minute ventilation (ΔVE), and heart rate change (ΔHR) was strong for both men (adj. r2 = 0.900, P < 0.001) and women (adj. r2 = 0.957, P < 0.001).
measurementElectromyography of the extra-diaphragmatic inspiratory muscles (sternocleidomastoid and scalene muscles) is significantly greater in women than in men at all submaximal time points and at maximal exercise during incremental leg cycling, despite women having lower minute ventilation (VE) compared to men.
claimThe oxygen cost of breathing for a given minute ventilation (VE) is greater in women compared to men, likely due to women having smaller lung size and airway diameters.
measurementMen and women have similar energy costs for minute ventilation (V̇E), measured as 1 Watt for every 1.2 L min−1 increment.
claimWhen using multiple regression to predict changes in energy expenditure (ΔEE), both changes in minute ventilation (ΔV̇E) and changes in heart rate (ΔHR) were statistically significant predictors for both men and women.
claimThe study used sex-specific models to analyze changes in energy expenditure (EE), minute ventilation (V̇E), and heart rate (HR), which resulted in similar changes for both men and women.
measurementA multivariate model using energy expenditure (EE), minute ventilation (V̇E), and heart rate (HR) to predict hypoxia-induced reduction in peripheral oxygen saturation (ΔSpO2) achieved a very strong fit for both men (r2 = 0.900, P < 0.001) and women (r2 = 0.957, P < 0.001).
claimEstrogen and progesterone have a stimulatory effect on minute ventilation (V̇E).
measurementAt a minute ventilation (V̇E) of approximately 55 L min−1, the oxygen uptake (V̇O2) of the respiratory muscle is significantly greater in women than in men.
claimIn the study titled 'Sex differences in respiratory and circulatory cost during hypoxic', researchers suggest that the role of minute ventilation (V̇E) in SpO2 changes is larger for women than for men, potentially due to a reduction in dead space ventilation and an increase in alveolar ventilation.
claimThe relative contributions of energy expenditure (EE), minute ventilation (V̇E), and heart rate (HR) to hypoxia-induced reduction in peripheral oxygen saturation (ΔSpO2) differ between sexes, with the contribution of EE and V̇E in women being about two-fold higher than in men, while the contribution of HR in men is greater than in women.
measurementIn a study of sex differences in respiratory and circulatory cost during hypoxic walking, the correlation between changes in minute ventilation (ΔV̇E) and changes in heart rate (ΔHR) was analyzed using second-order polynomial regression, yielding an r2 of 0.718 for men and 0.615 for women.
claimResting minute ventilation (V̇E) is higher or the same in the luteal phase of the menstrual cycle, when progesterone concentrations are highest, compared to the follicular phase.
claimResting minute ventilation (V̇E) responsiveness to hypoxia is sensitive to progesterone levels.
procedureThe researchers used ordinary least squares linear regression to compare ΔEE to Δ({\dot{{\rm{V}}}}{{\rm{E}}}) and ΔHR, and used multiple regression to assess the independent, additive effects of ({\dot{{\rm{V}}}}{{\rm{E}}}) and HR on ΔEE, setting the intercept to 0 under the assumption that ΔEE was attributable to circulatory and ventilatory expenditure.
procedureThe researchers calculated changes in SpO2 with hypoxia and used multiple regression analysis to test for the independent, additive effects of energy expenditure (EE), ({\dot{{\rm{V}}}}{{\rm{E}}}), and heart rate (HR) on SpO2 after logarithmic transformation.
Sex differences in the cardiopulmonary and neuromuscular ... biorxiv.org Nov 11, 2024 4 facts
referenceFemales exhibit greater relative minute ventilation (VE) during constant-load exercise in the heavy and severe intensity domains, as observed by Ansdell et al. (2020a).
measurementIn absolute values, males had greater minute ventilation (E) throughout an interval exercise task compared to females (p < 0.001).
referenceFemales have lesser alveolar surface area than males, which results in poorer oxygen diffusing capacity during exercise and necessitates greater relative minute ventilation (VE) to achieve the same relative oxygen consumption (VO2) and carbon dioxide production (VCO2), as reported by Bouwsema et al. (2017).
measurementFor the ratio of minute ventilation to carbon dioxide production (E/VCO2), there was no main effect of sex (p = 0.096), but a sex × time interaction effect was observed (p = 0.046), with females showing greater values than males during the first (p = 0.034) and second (p = 0.006) intervals of an exercise task.
Sex differences in cardiorespiratory control under hypoxia - Frontiers frontiersin.org Jan 30, 2025 4 facts
procedureThe experimental protocol for the study on sex differences in cardiorespiratory control under hypoxia involved recording hemodynamic variables (heart rate, stroke volume, cardiac output, blood pressure) and respiratory variables (breathing frequency, tidal volume, minute ventilation, SpO2) after a 20-minute rest period in a sitting position.
formulaMinute ventilation (VE) is calculated as the product of breath-by-breath tidal volume (Vt) and breathing frequency (BF), where tidal volume is determined from the integral of the flow signal and breathing frequency is determined by the number of events per minute in the flow signal.
measurementFemales had a minute ventilation (VE) of 12.44 ± 2.69 L.min−1 under normoxia and 12.87 ± 2.56 L.min−1 under iso-saturation hypoxia.
measurementMales had a minute ventilation (VE) of 15.16 ± 2.47 L.min−1 under normoxia and 16.72 ± 3.64 L.min−1 under iso-saturation hypoxia.