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This study explored menopause\u2019s influence on physiological responses during rest and exercise in normobaric hypoxia and its role in predicting acute mountain sickness (AMS).<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>Thirteen eumenorrheic women in their mid-luteal phase (EW, age\u2009=\u200932\u2009\u00b1\u20098\u00a0year) and fifteen postmenopausal women (PW, age\u2009=\u200963\u2009\u00b1\u20092\u00a0year) were examined on two occasions. Their ovarian hormonal levels were measured. In the first visit, hypoxic ventilatory response (HVR), physiological responses (ventilation, pulse oximetry, and heart rate) at rest and exercise in normobaric hypoxia (F<jats:sub>i<\/jats:sub>O<jats:sub>2<\/jats:sub>\u2009=\u20090.14) and anxiety levels were tested. On the second visit, cortisol awakening response and oxidative stress markers were measured at low altitude, with cortisol awakening response repeated during an overnight stay at high altitude (3375\u00a0m) along with evaluation for AMS using the Lake Louise Score, peripheral oxygen saturation and anxiety levels.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>PW exhibited lower estradiol (16.9\u2009\u00b1\u200916.7 vs 4.6\u2009\u00b1\u20092.3\u00a0pg\/ml, p\u2009&lt;\u20090.01) and progesterone (13.39\u2009\u00b1\u20097.61 vs 0.06\u2009\u00b1\u20090.07\u00a0ng\/ml, p\u2009&lt;\u20090.001) levels than EW. Despite higher ventilation at rest in EW compared to PW in normoxia\u00a0(10.0\u2009\u00b1\u20091.5 vs 8.5\u2009\u00b1\u20090.9 L\/min; p\u2009&lt;\u20090.01) and hypoxia (9.4 \u00b1 1.3 vs 8.2 \u00b1 1.3 L\/min)\u00a0, HVR (\u2013\u00a00.34\u2009\u00b1\u20090.13 vs \u2013\u00a00.27\u2009\u00b1\u20090.15 L\/min\/%) was similar between groups (p\u2009=\u20090.26). AMS incidence did not differ between EW (31%) and PW (40%).<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>In conclusion, EW had higher ventilation at rest in normoxia and normobaric hypoxia compared to PW, but similar responses and AMS incidence at high altitude. Age has minimal impact on HVR in women.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s00421-025-05790-6","type":"journal-article","created":{"date-parts":[[2025,4,29]],"date-time":"2025-04-29T06:54:24Z","timestamp":1745909664000},"page":"2857-2867","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Impact of menopause on responses to hypoxia and incidence of acute mountain sickness"],"prefix":"10.1007","volume":"125","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-4492-0227","authenticated-orcid":false,"given":"Tom","family":"Citherlet","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5032-8301","authenticated-orcid":false,"given":"Antoine","family":"Raberin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9529-4977","authenticated-orcid":false,"given":"Giorgio","family":"Manferdelli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8081-4423","authenticated-orcid":false,"given":"Gr\u00e9goire P.","family":"Millet","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,4,29]]},"reference":[{"key":"5790_CR1","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1016\/j.resp.2013.05.020","volume":"188","author":"PN Ainslie","year":"2013","unstructured":"Ainslie PN, Lucas SJE, Burgess KR (2013) Breathing and sleep at high altitude. 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