{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T10:53:56Z","timestamp":1787655236365,"version":"build-2736575974"},"reference-count":20,"publisher":"Wiley","issue":"13","license":[{"start":{"date-parts":[[2025,7,7]],"date-time":"2025-07-07T00:00:00Z","timestamp":1751846400000},"content-version":"vor","delay-in-days":6,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003793","name":"Hj\u00e4rt-Lungfonden","doi-asserted-by":"publisher","award":["20210468"],"award-info":[{"award-number":["20210468"]}],"id":[{"id":"10.13039\/501100003793","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004885","name":"Ume\u00e5 Universitet","doi-asserted-by":"publisher","award":["RV828131"],"award-info":[{"award-number":["RV828131"]}],"id":[{"id":"10.13039\/501100004885","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["physoc.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiological Reports"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>As cold\u2010water immersion becomes more popular and accessible, it is important to explore potential risks. This study examines the cardiac autonomic response and arrhythmia occurrence in healthy adolescents during face and body immersion. Healthy ninth\u2010grade students, aged 15\u201316\u2009years, were recruited to perform face immersion (FI) in 10\u00b0C water and body immersion in 2\u00b0C water (IWI). Electrocardiograms (ECGs) were continuously recorded, and the heart rate (HR) response and occurrence of arrhythmias were assessed. Among the 54 individuals performing FI, six had supraventricular extrasystoles, and two had ventricular bigeminy. Among the 20 performing IWI, four had supraventricular extrasystoles. The HR response was more pronounced during FI compared to IWI (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). During both FI and IWI, girls showed initially higher HR and more pronounced HR reduction than boys, but there were no significant sex differences (<jats:italic>p<\/jats:italic>\u2009=\u20090.26). During the first 30\u2009seconds of IWI, boys maintained a steady HR (<jats:italic>p<\/jats:italic>\u2009=\u20090.176), while girls experienced a near\u2010linear reduction (<jats:italic>p<\/jats:italic>\u2009=\u20090.009). This study indicates a low risk of severe arrhythmias when briefly immersing the body in ice\u2010cold water in healthy adolescents. However, the risk could increase if combined with face submersion and apnea.<\/jats:p>","DOI":"10.14814\/phy2.70430","type":"journal-article","created":{"date-parts":[[2025,7,8]],"date-time":"2025-07-08T01:40:46Z","timestamp":1751938846000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Assessment of arrhythmias and heart rate response in healthy adolescents performing face immersion and body submersion in ice\u2010cold water"],"prefix":"10.14814","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7826-1804","authenticated-orcid":false,"given":"Anna","family":"Lundstr\u00f6m","sequence":"first","affiliation":[{"name":"Department of Clinical Sciences Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcus","family":"Karlsson","sequence":"additional","affiliation":[{"name":"Department of Diagnostics and Intervention Biomedical Engineering and Radiation Physics, Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annika","family":"Rydberg","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1313-0934","authenticated-orcid":false,"given":"Urban","family":"Wiklund","sequence":"additional","affiliation":[{"name":"Department of Diagnostics and Intervention Biomedical Engineering and Radiation Physics, Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,7,7]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2015-094722"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1152\/physiol.00002.2015"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-012-2552-0"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1586\/erc.10.74"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421-013-2690-z"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0838.2005.00440.x"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02691277"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1113\/expphysiol.2006.035261"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph17238984"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1207\/s15327558ijbm1102_8"},{"key":"e_1_2_12_12_1","doi-asserted-by":"publisher","DOI":"10.1249\/JSR.0000000000000653"},{"issue":"8","key":"e_1_2_12_13_1","first-page":"Be01","article-title":"Role of biological sex in normal cardiac function and in its disease outcome \u2010 a review","volume":"8","author":"Prabhavathi K.","year":"2014","journal-title":"Journal of Clinical and Diagnostic Research"},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.autneu.2013.12.001"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2012.229864"},{"key":"e_1_2_12_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(99)07273-6"},{"key":"e_1_2_12_17_1","doi-asserted-by":"publisher","DOI":"10.1042\/cs0770581"},{"key":"e_1_2_12_18_1","doi-asserted-by":"publisher","DOI":"10.1113\/ep086283"},{"issue":"3","key":"e_1_2_12_19_1","first-page":"305","article-title":"Supraventricular arrhythmias following breath\u2010hold submersions in cold water","volume":"21","author":"Tipton M. 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