{"id":102030,"date":"2025-05-14T23:27:08","date_gmt":"2025-05-14T23:27:08","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/102030\/"},"modified":"2025-05-14T23:27:08","modified_gmt":"2025-05-14T23:27:08","slug":"exercise-is-the-key-to-maintaining-vitamin-d-levels-in-winter-study-finds","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/102030\/","title":{"rendered":"Exercise is the key to maintaining Vitamin D levels in winter, study finds"},"content":{"rendered":"<p>            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.europesays.com\/uk\/wp-content\/uploads\/2025\/05\/1-exercise.jpg\" alt=\"exercise\" title=\"Credit: Unsplash\/CC0 Public Domain\" width=\"800\" height=\"530\"\/><\/p>\n<p>                Credit: Unsplash\/CC0 Public Domain<\/p>\n<p>The sun may be shining now, and our vitamin D levels are getting a natural boost, but it wasn&#8217;t long ago that we were in the depths of winter, when sunlight was scarce and vitamin D was in short supply.<\/p>\n<p>Now, new research from the University of Bath, University of Birmingham, University of Cambridge and others, <a href=\"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/10.1002\/advs.202416312\" target=\"_blank\" rel=\"noopener\">published<\/a> in Advanced Science, has revealed that regular, <a href=\"https:\/\/medicalxpress.com\/tags\/moderate-intensity+exercise\/\" rel=\"tag noopener\" class=\"textTag\" target=\"_blank\">moderate-intensity exercise<\/a> helps maintain crucial vitamin D levels during the darker months\u2014even without weight loss or supplements.<\/p>\n<p>Researchers found that people with overweight and obesity who completed a 10\u2011week indoor exercise program over <a href=\"https:\/\/medicalxpress.com\/tags\/winter\/\" rel=\"tag noopener\" class=\"textTag\" target=\"_blank\">winter<\/a> experienced significantly smaller drops in vitamin D levels compared to those who didn&#8217;t exercise\u2014even though their <a href=\"https:\/\/medicalxpress.com\/tags\/body+weight\/\" rel=\"tag noopener\" class=\"textTag\" target=\"_blank\">body weight<\/a> was deliberately maintained.<\/p>\n<p>The program involved four sessions per week: two treadmill walks, one longer steady\u2011state bike ride, and one high\u2011intensity interval bike session.<\/p>\n<p>Notably, exercise completely preserved the body&#8217;s active form of vitamin D (1,25(OH)\u2082D\u2083), which plays a key role in supporting bone health, the immune system, and various organs. Previous studies suggest that vitamin D supplements alone do not help maintain this active form.<\/p>\n<p>Lead author Dr. Oly Perkin, from the Centre for Nutrition, Exercise and Metabolism, Department for Health at the University of Bath, said, &#8220;This is the first study to show that exercise alone can protect against the winter dip in vitamin D. It&#8217;s a powerful reminder that we still have lots to learn about how exercise benefits our health.&#8221;<\/p>\n<p>                                                                                                                                                                                                Key findings:<\/p>\n<ul>\n<li>People who exercised saw a smaller drop in their overall vitamin D levels over winter\u2014about 15%, compared to a 25% drop in those who didn&#8217;t exercise.<\/li>\n<li>Importantly, those who exercised kept healthy levels of the active form of vitamin D, which helps support the <a href=\"https:\/\/medicalxpress.com\/tags\/immune+system\/\" rel=\"tag noopener\" class=\"textTag\" target=\"_blank\">immune system<\/a> and bone health.<\/li>\n<li>In the non\u2011exercising group, levels of this active form fell by 15%.<\/li>\n<li>Weight was kept stable throughout the study, proving the effect was due to exercise\u2014not <a href=\"https:\/\/medicalxpress.com\/tags\/weight+loss\/\" rel=\"tag noopener\" class=\"textTag\" target=\"_blank\">weight loss<\/a>.<\/li>\n<\/ul>\n<p>To ensure sunlight didn&#8217;t skew results, the study ran between October and April\u2014when natural vitamin D production from sunlight is minimal in this part of the UK\u2014and participants were asked to avoid supplements.<\/p>\n<p>A previous study from the team showed that a single workout can briefly boost vitamin D levels. This is the first to show that regular cardio exercise can maintain basal circulating vitamin D levels and offer lasting protection during the winter months.<\/p>\n<p>Prof Dylan Thompson, Principal Investigator for the VitaDEx study, said, &#8220;Collectively, the findings from the VitaDEx project show that exercise increases the concentrations of vitamin D metabolites each time you are active\u2014and, on top of this, doing regular activity helps to maintain your basal resting levels of vitamin D during winter. This means exercise gives you a double benefit to your vitamin D\u2014firstly in and around each exercise bout, and secondly through changing your baseline levels.&#8221;<\/p>\n<p>With over 50 adults taking part in this sophisticated and carefully designed randomized controlled trial, the study offers compelling evidence that exercise could be an effective winter vitamin D strategy\u2014especially for those who are overweight or obese, for whom vitamin D supplements are less effective.<\/p>\n<p>Liam Kilawee, who took part in the study, said, &#8220;I was impressed by how thorough the process was and how the team engaged with me during the research period. The results were pleasing as I could see that my actions had a positive reaction.&#8221;<\/p>\n<p>Dr. Perkin added, &#8220;If you&#8217;re worried about your vitamin D levels in the winter, keeping up regular exercise every week will help, and offer a load of health benefits that vitamin D supplements cannot.&#8221;<\/p>\n<p>Prof. Thompson added, &#8220;These findings have implications for policymakers and health care professionals. Exercise should be part of any strategy to improve vitamin D status and metabolism during winter.&#8221;<\/p>\n<p><strong>More information:<\/strong><br \/>\n                                                    Oliver J. Perkin et al, Exercise without Weight Loss Prevents Seasonal Decline in Vitamin D Metabolites: The VitaDEx Randomized Controlled Trial, Advanced Science (2025). <a data-doi=\"1\" href=\"https:\/\/dx.doi.org\/10.1002\/advs.202416312\" target=\"_blank\" rel=\"noopener\">DOI: 10.1002\/advs.202416312<\/a><\/p>\n<p>\t\t\t\t\t\t\t\t\t\t\t\tProvided by<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/medicalxpress.com\/partners\/university-of-bath\/\" target=\"_blank\" rel=\"noopener\">University of Bath<\/a><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"icon_open\" href=\"http:\/\/www.bath.ac.uk\/\" target=\"_blank\" rel=\"nofollow noopener\"><\/p>\n<p>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a><\/p>\n<p>\n                                                 <strong>Citation<\/strong>:<br \/>\n                                                 Exercise is the key to maintaining Vitamin D levels in winter, study finds (2025, May 14)<br \/>\n                                                 retrieved 14 May 2025<br \/>\n                                                 from https:\/\/medicalxpress.com\/news\/2025-05-key-vitamin-d-winter.html\n                                            <\/p>\n<p>\n                                            This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no<br \/>\n                                            part may be reproduced without the written permission. The content is provided for information purposes only.\n                                            <\/p>\n","protected":false},"excerpt":{"rendered":"Credit: Unsplash\/CC0 Public Domain The sun may be shining now, and our vitamin D levels are getting a&hellip;\n","protected":false},"author":2,"featured_media":102031,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4322],"tags":[1630,105,1555,1554,1556,1553,1552,1557,16,15],"class_list":{"0":"post-102030","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-fitness","8":"tag-fitness","9":"tag-health","10":"tag-health-research","11":"tag-health-research-news","12":"tag-health-science","13":"tag-medicine-research","14":"tag-medicine-research-news","15":"tag-medicine-science","16":"tag-uk","17":"tag-united-kingdom"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@uk\/114508781624460854","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/102030","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=102030"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/102030\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/102031"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=102030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=102030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=102030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}