{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T16:14:09Z","timestamp":1789402449219,"version":"build-2803163510"},"reference-count":45,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T00:00:00Z","timestamp":1743724800000},"content-version":"vor","delay-in-days":3,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100007465","name":"Universitetet i Troms\u00f8","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007465","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100016934","name":"Troms\u00f8 Forskningsstiftelse","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100016934","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The ability to maintain running economy is generally evaluated during a long continuous exercise bouts, and it is unclear whether the menstrual cycle phase acts as a confounder. The first aim of this study was to evaluate the ability to maintain running economy during typical 1\u2010h low\u2010 (LIT) and high\u2010intensity training (HIT) sessions in female athletes. The second aim was to investigate whether menstrual cycle phase affected the ability to maintain running economy. Naturally menstruating endurance\u2010trained females performed three LIT (\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200916) (45%\u201355% of the maximal velocity achieved during the maximal incremental test) and\/or three HIT sessions (\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200917) (5\u2009\u00d7\u20094\u2009min at 80% of the maximal velocity achieved during the maximal incremental test) during three distinct menstrual cycle phases: early follicular, ovulatory, and mid luteal. Running economy was determined before and after each session. Running economy, expressed as energy cost (before: 1.34; after: 1.34\u2009kcal\/kg\/km,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.797) and oxygen cost (before: 272, after: 273\u2009mL\/kg\/min,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.348), was not significantly different before versus after the LIT session. Energy cost (before 1.33; after: 1.34\u2009kcal\/kg\/km,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.130) was not significantly different before versus after the HIT session, but oxygen cost (before: 269; after: 274\u2009mL\/kg\/km,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.003) was slightly higher after the session. Menstrual cycle phase did not confound the ability to maintain running economy. Running economy can be maintained during a typical 1\u2010h LIT session. The ability to maintain running economy during a typical HIT session depends on the expression used; energy cost was unaffected, while oxygen cost may be slightly increased after HIT sessions.\n                  <\/jats:p>","DOI":"10.1111\/sms.70050","type":"journal-article","created":{"date-parts":[[2025,4,5]],"date-time":"2025-04-05T18:33:14Z","timestamp":1743877994000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Running Economy After a Low\u2010 and High\u2010Intensity Training Session in Naturally Menstruating Endurance\u2010Trained Female Athletes: The\n                    <scp>FENDURA<\/scp>\n                    Project"],"prefix":"10.1111","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9094-992X","authenticated-orcid":false,"given":"Heleen","family":"Docter","sequence":"first","affiliation":[{"name":"Department of Human Movement Sciences Vrije Universiteit Amsterdam  the Netherlands"},{"name":"Centre for Elite Sports Research, Department of Neuromedicine and Movement Science Norwegian University of Science and Technology  Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-4241-3004","authenticated-orcid":false,"given":"Madison","family":"Taylor","sequence":"additional","affiliation":[{"name":"School of Sport Sciences UiT The Arctic University of Norway  Troms\u00f8 Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna Lena","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Centre for Elite Sports Research, Department of Neuromedicine and Movement Science Norwegian University of Science and Technology  Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos J.","family":"de Koning","sequence":"additional","affiliation":[{"name":"Department of Human Movement Sciences Vrije Universiteit Amsterdam  the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u00d8yvind B.","family":"Sandbakk","sequence":"additional","affiliation":[{"name":"School of Sport Sciences UiT The Arctic University of Norway  Troms\u00f8 Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John O.","family":"Osborne","sequence":"additional","affiliation":[{"name":"School of Sport Sciences UiT The Arctic University of Norway  Troms\u00f8 Norway"},{"name":"Sunshine Coast Hospital and Health Service  Birtinya Australia"},{"name":"School of Health University of the Sunshine Coast  Sippy Downs Australia"},{"name":"School of Exercise and Nutrition Sciences Queensland University of Technology  Brisbane Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dionne A.","family":"Noordhof","sequence":"additional","affiliation":[{"name":"Centre for Elite Sports Research, Department of Neuromedicine and Movement Science Norwegian University of Science and Technology  Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,4]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2007.143834"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1113\/JP284205"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-973011"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/sms.14637"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00626607"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s004210050346"},{"issue":"2","key":"e_1_2_10_8_1","first-page":"162","article-title":"Changes in Running Economy During a 5\u2010Km Run in Trained Men and Women Runners","volume":"13","author":"Thomas D. 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