{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T12:52:12Z","timestamp":1761828732032,"version":"build-2065373602"},"reference-count":27,"publisher":"Canadian Science Publishing","license":[{"start":{"date-parts":[[2025,1,1]],"date-time":"2025-01-01T00:00:00Z","timestamp":1735689600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"funder":[{"name":"University of Georgia Department of Kinesiology"},{"DOI":"10.13039\/100007699","name":"University of Georgia","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100007699","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["cdnsciencepub.com"],"crossmark-restriction":false},"short-container-title":["Appl. Physiol. Nutr. Metab."],"published-print":{"date-parts":[[2025,1,1]]},"abstract":"<jats:p>\n                    Fluctuations in female sex hormones may influence the cardiorespiratory response to exercise. Cardiorespiratory response to high-intensity interval exercise (HIIE) across the menstrual cycle (MC) or with oral contraceptive (OC) use has limited data. Therefore, the influence of MC phase and OC use on cardiorespiratory response during HIIE was assessed. Twenty-five females (24.4 (3.6) years) were categorized by a natural MC (non-oral contraceptive users (NOC), n\u00a0=\u00a014) or OC use ( n\u00a0=\u00a011). HIIE was four sets of four repetitions with 3 min rest between intervals on a cycle ergometer at a power output halfway between the ventilatory threshold and V\u0307O\n                    <jats:sub>2peak.<\/jats:sub>\n                    An HIIE bout was performed during the early follicular and mid-luteal phases (days 2\u20137 and \u223c21 of the MC) and during inactive (days 2\u20137) and active pill (third week) phases. Cardiorespiratory responses to HIIE were assessed via indirect calorimetry. No group or cycle phase differences were noted for relative and absolute VO\n                    <jats:sub>2<\/jats:sub>\n                    , ventilatory exchange, heart rate, or rating of perceived exertion ( p\u00a0&gt;\u00a00.05). In NOC during the follicular phase, FEO\n                    <jats:sub>2<\/jats:sub>\n                    and V\u0307E\/V\u0307O\n                    <jats:sub>2<\/jats:sub>\n                    during pre-exercise seated rest was lower compared to the luteal phase ( p\u00a0&lt;\u00a00.05). In NOC during the follicular phase, V\u0307E\/CO\n                    <jats:sub>2<\/jats:sub>\n                    , FEO\n                    <jats:sub>2<\/jats:sub>\n                    , FECO\n                    <jats:sub>2,<\/jats:sub>\n                    V\u0307E\/V\u0307O\n                    <jats:sub>2<\/jats:sub>\n                    , and V\u0307E\/CO\n                    <jats:sub>2<\/jats:sub>\n                    during warmup was lower compared to the luteal phase ( p\u00a0&lt;\u00a00.05). Most cardiorespiratory variables assessed do not appear to be impacted by MC phase or OC use during HIIE.\n                  <\/jats:p>","DOI":"10.1139\/apnm-2025-0112","type":"journal-article","created":{"date-parts":[[2025,9,22]],"date-time":"2025-09-22T21:34:53Z","timestamp":1758576893000},"page":"1-8","update-policy":"https:\/\/doi.org\/10.1139\/csp-crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Cardiorespiratory response to high-intensity interval exercise across the menstrual cycle and with oral contraceptive use in recreationally active females"],"prefix":"10.1139","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2217-8067","authenticated-orcid":false,"given":"Alyssa A.","family":"Olenick","sequence":"first","affiliation":[{"name":"University of Georgia","place":["Athens, USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4704-920X","authenticated-orcid":false,"given":"Regis C.","family":"Pearson","sequence":"additional","affiliation":[{"name":"University of Georgia","place":["Athens, USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nathan T.","family":"Jenkins","sequence":"additional","affiliation":[{"name":"University of Georgia","place":["Athens, USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"155","reference":[{"key":"refg1\/ref1","doi-asserted-by":"publisher","DOI":"10.1519\/JSC.0000000000003447"},{"key":"refg2\/ref2","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph20043266"},{"key":"refg3\/ref3","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph18041667"},{"key":"refg4\/ref4","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00622.2002"},{"key":"refg5\/ref5","doi-asserted-by":"publisher","DOI":"10.1080\/13625187.2021.2021176"},{"key":"refg6\/ref6","doi-asserted-by":"publisher","DOI":"10.1007\/s40279-020-01317-5"},{"key":"refg7\/ref7","doi-asserted-by":"publisher","DOI":"10.1080\/001401300750003989"},{"key":"refg8\/ref8","doi-asserted-by":"publisher","DOI":"10.1111\/cpf.12469"},{"key":"refg9\/ref9","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.1981.51.6.1493"},{"issue":"3","key":"refg10\/ref10","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1249\/00005768-199503000-00022","volume":"27","author":"Lebrun C.M.","year":"1995","journal-title":"Med. 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