Tom Citherlet, Antoine Raberin, Giorgio Manferdelli, Nicolas Bourdillon, Grégoire P Millet
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引用次数: 0
Abstract
Citherlet, Tom, Antoine Raberin, Giorgio Manferdelli, Nicolas Bourdillon, and Grégoire P Millet. Impact of the menstrual cycle (MC) on the cardiovascular and ventilatory responses during exercise in normoxia and hypoxia. High Alt Med Biol. 00:00-00, 2024. Introduction: Ovarian hormones influence several physiological functions in women. This study investigated how the hormonal variations across the menstrual cycle (MC) impact cardiovascular and ventilatory responses during rest and moderate exercise in normobaric hypoxia. Methods: Thirteen eumenorrheic women were tested during the early follicular (Fol1), late follicular (Fol2), and mid-luteal (Lut3) phases with measurement of hormonal levels. Heart rate (HR) variability, blood pressure, and baroreflex sensitivity (BRS) were evaluated at rest in normoxia. Ventilation (VE), peripheral oxygen saturation, and HR were monitored at rest and during moderate-intensity cycling exercise in hypoxia (FiO2 = 14%). Results: Despite expected hormone level variations, no significant changes were observed across the MC in HR variability (root mean square of successive differences; 64 (95% confidence interval [47, 81]) at Fol1, 54 [42, 66] at Fol2, 60 [44, 77] ms at Lut3), blood pressure (mean blood pressure; 85 [79, 90]), 87 [81, 93]), 84 [77, 92] mmHg), BRS (26 [17, 36], 28 [20, 35], 23 [17, 29] ms/mmHg), VE (rest: 8.9 [7.9, 9.8], 9.5 [9.0, 9.9], 9.0 [8.1, 9.9]; exercise: 53 [41, 66], 51.1 [36.4, 65.7], 54.4 [34.0, 74.8] l/min), peripheral oxygen saturation (rest: 89.8 [87.4, 92.1], 91.9 [88.7, 95.0], 90.2 [87.8, 92.6]; exercise: 80.5 [77.4, 83.5], 84.4 [80.4, 88.3], 81.9 [78.3, 85.4] %) HR (rest: 69.7 [60.2, 79.1], 70.8 [63.2, 78.3], 70.5 [64.0, 77.0]; exercise: 148 [136, 160], 146 [132, 161], 146 [132, 160] bpm), and cycling efficiency (0.17 [0.16, 0.18], 0.17 [0.13, 0.21], 0.16 [0.15, 0.18] %) (all p > 0.05). Discussion: From a practical point of view, there is no strong evidence of any usefulness of monitoring hormonal variations and the MC phases for women exercising in hypoxia.
汤姆-西瑟莱、安托万-拉贝兰、乔治-曼费德利、尼古拉斯-布尔迪隆和格雷瓜尔-P-米莱。月经周期(MC)对常氧和低氧运动时心血管和通气反应的影响。00:00-00, 2024.引言:卵巢激素影响女性的多种生理功能。本研究探讨了整个月经周期(MC)中的激素变化如何影响女性在常压低氧条件下进行静息和适度运动时的心血管和换气反应。研究方法在卵泡早期(Fol1)、卵泡晚期(Fol2)和黄体中期(Lut3)对 13 名月经过多的女性进行测试,测量她们的激素水平。在常氧静息状态下评估心率(HR)变异性、血压和气压反射敏感性(BRS)。在低氧状态下(FiO2 = 14%),监测静息时和中等强度骑车运动时的通气量(VE)、外周血氧饱和度和心率。结果:尽管预期激素水平会有变化,但在各 MC 中未观察到心率变异性的显著变化(连续差异的均方根;89.8[87.4,92.1],91.9[88.7,95.0],90.2[87.8,92.6];运动:80.5[77.4,83.5],84.4[80.4,88.3],81.9[78.3,85.4]%)心率(静息时:69.7[60.2,60.3];运动时:69.7[60.2,60.3]):69.7[60.2,79.1],70.8[63.2,78.3],70.5[64.0,77.0];运动:148[136,160],146[132,161],146[132,160] bpm)和骑行效率(0.17[0.16,0.18],0.17[0.13,0.21],0.16[0.15,0.18]%)(所有 p > 0.05)。讨论从实用角度来看,没有强有力的证据表明监测激素变化和 MC 阶段对在缺氧环境中锻炼的女性有任何帮助。
期刊介绍:
High Altitude Medicine & Biology is the only peer-reviewed journal covering the medical and biological issues that impact human life at high altitudes. The Journal delivers critical findings on the impact of high altitude on lung and heart disease, appetite and weight loss, pulmonary and cerebral edema, hypertension, dehydration, infertility, and other diseases. It covers the full spectrum of high altitude life sciences from pathology to human and animal ecology.