{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T14:58:14Z","timestamp":1783781894543,"version":"3.55.0"},"reference-count":29,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,5,26]],"date-time":"2024-05-26T00:00:00Z","timestamp":1716681600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003478","name":"Ministry of Health, Labour and Welfare","doi-asserted-by":"publisher","award":["22FA1023"],"award-info":[{"award-number":["22FA1023"]}],"id":[{"id":"10.13039\/501100003478","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["22K10752"],"award-info":[{"award-number":["22K10752"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["23KJ0288"],"award-info":[{"award-number":["23KJ0288"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sleep Research"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>This study investigated the association between underweight and sleep in young females across their menstrual cycles. A lifestyle\u2010monitoring survey was conducted among 38 female university students aged 18\u201324\u2009years in Japan from January to December 2023. Sleep data from 28 participants were analysed. Participants were categorized into underweight (<jats:italic>n<\/jats:italic>\u2009=\u200910) and control (<jats:italic>n<\/jats:italic>\u2009=\u200918) groups based on a baseline body mass index cut\u2010off of 18.5\u2005kg\u2005m<jats:sup>\u22122<\/jats:sup>. Sleep parameters were assessed using a daily sleep questionnaire, sleep sensor mats, and urinary melatonin metabolites across their menstrual cycles. The results indicated no significant differences in sleep patterns between the underweight and control groups or menstrual cycle phases, as assessed using both the daily sleep questionnaire and the sleep sensor mats. However, underweight participants experienced more difficulty maintaining sleep during the follicular phase. Body mass index significantly correlated with sleep efficiency (<jats:italic>r<\/jats:italic><jats:sub>s<\/jats:sub>\u2009=\u20090.52) and wake after sleep onset (<jats:italic>r<\/jats:italic><jats:sub>s<\/jats:sub>\u2009=\u2009\u22120.56). While urinary melatonin metabolite levels did not differ significantly between the groups or menstrual cycle phases, decreased levels during the luteal phase were more prevalent in the underweight group (7 of 10 participants) than in the control group (3 of 13 participants). This study suggests an association between underweight and sleep quality, especially nocturnal awakening, in young females. These findings underscore the importance of considering sleep quality in the management of underweight young females to improve their overall health outcomes.<\/jats:p>","DOI":"10.1111\/jsr.14254","type":"journal-article","created":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T04:39:06Z","timestamp":1716784746000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Sleep characteristics in underweight young females across their menstrual cycles: A sleep\u2010monitoring survey study with preliminary results"],"prefix":"10.1111","volume":"34","author":[{"given":"Momoko","family":"Kayaba","sequence":"first","affiliation":[{"name":"Institute of Medicine, University of Tsukuba  Tsukuba Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katsuhiko","family":"Yajima","sequence":"additional","affiliation":[{"name":"Faculty of Pharmaceutical Sciences Josai University  Sakado Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mao","family":"Nogami","sequence":"additional","affiliation":[{"name":"Graduate School of Humanities and Social Sciences Hiroshima University  Higashihiroshima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sayaka","family":"Nose\u2010Ogura","sequence":"additional","affiliation":[{"name":"Department of Sport Medicine and Research Japan Institute Sports Sciences, Japan High\u2010Performance Sport Center  kita\u2010ku Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hitomi","family":"Ogata","sequence":"additional","affiliation":[{"name":"Graduate School of Humanities and Social Sciences Hiroshima University  Higashihiroshima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,5,26]]},"reference":[{"key":"e_1_2_14_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejogrb.2016.10.012"},{"key":"e_1_2_14_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11914-014-0226-z"},{"key":"e_1_2_14_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9258(19)51334-5"},{"key":"e_1_2_14_5_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph191811681"},{"key":"e_1_2_14_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.metabol.2020.154229"},{"key":"e_1_2_14_7_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000287293.25465.e1"},{"key":"e_1_2_14_8_1","doi-asserted-by":"publisher","DOI":"10.1186\/1742-4755-11-S3-S3"},{"key":"e_1_2_14_9_1","doi-asserted-by":"publisher","DOI":"10.4103\/jfmpc.jfmpc_21_21"},{"key":"e_1_2_14_10_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13643-021-01730-5"},{"key":"e_1_2_14_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-021-91828-6"},{"key":"e_1_2_14_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.heliyon.2023.e14994"},{"key":"e_1_2_14_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sleep.2020.02.017"},{"key":"e_1_2_14_14_1","doi-asserted-by":"publisher","DOI":"10.2114\/jpa2.30.103"},{"key":"e_1_2_14_15_1","doi-asserted-by":"publisher","DOI":"10.1111\/ijcp.12801"},{"key":"e_1_2_14_16_1","doi-asserted-by":"publisher","DOI":"10.1080\/07420528.2019.1694938"},{"key":"e_1_2_14_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jchromb.2009.02.003"},{"key":"e_1_2_14_18_1","unstructured":"Ministry of Health Labour and Welfare in Japan. 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