{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T13:27:42Z","timestamp":1784899662915,"version":"3.55.0"},"reference-count":43,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2023,2,1]],"date-time":"2023-02-01T00:00:00Z","timestamp":1675209600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Haemophilia"],"published-print":{"date-parts":[[2023,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Limited evidence exists on objectively measured habitual physical activity (PA) of young people with haemophilia (PWH).<\/jats:p><\/jats:sec><jats:sec><jats:title>Aims<\/jats:title><jats:p>To compare different outcomes of objective PA between young PWH A and controls using a commercial activity tracker.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We enrolled males\u00a0aged 13\u201330 years with moderate and severe haemophilia A, without inhibitors on regular prophylaxis. PA was measured with the activity tracker Fitbit Charge 3\u00a0for 12\u00a0weeks. Control group data was obtained from \u224860,000 Fitbit users, matched on age, sex and measurement period. PA variables [steps, intensities, volume, activity types, exercise frequencies and proportion meeting the World Health Organization's moderate\u2010to\u2010vigorous PA (MVPA) recommendations] were compared between groups descriptively and using Welch's two\u2010sample t\u2010test and two\u2010sample test of proportions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Forty PWH A were enrolled (mean age 19.5 years, 50% teenagers, 50% adults, three (7.5%) with moderate and 37 (92.5%) with severe haemophilia). Mean daily steps and minutes MVPA were similar between PWH and controls. PWH spent more time in light PA (mean 227\u00a0vs. 192 min\/day, <jats:italic>P<\/jats:italic>\u00a0=\u00a0.033) and exercised more frequently (mean 5.6\u00a0vs. 3.9 exercise sessions\/week, <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001). Among teenagers, 40% PWH and 8% controls reached MVPA recommendations, compared to 95% and 100% among adults. The most common type of PA was walking.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This cohort of young PWH A on prophylactic treatment had PA levels comparable to controls. Still, a considerable proportion of teenagers did not meet the recommended weekly volume of MVPA, and we encourage clinicians to have a particular focus on promoting PA for this group.<\/jats:p><\/jats:sec>","DOI":"10.1111\/hae.14752","type":"journal-article","created":{"date-parts":[[2023,2,1]],"date-time":"2023-02-01T16:18:55Z","timestamp":1675268335000},"page":"658-667","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Physical activity in Norwegian teenagers and young adults with haemophilia A compared to general population peers"],"prefix":"10.1111","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3961-0207","authenticated-orcid":false,"given":"Ruth Elise D.","family":"Matlary","sequence":"first","affiliation":[{"name":"Department of Haematology Oslo University Hospital  Oslo Norway"},{"name":"Institute of Clinical Medicine University of Oslo  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"May","family":"Grydeland","sequence":"additional","affiliation":[{"name":"Department of Physical Performance Norwegian School of Sport Sciences  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heidi","family":"Glosli","sequence":"additional","affiliation":[{"name":"Centre for Rare Disorders Oslo University Hospital  Oslo Norway"},{"name":"Department of Paediatric Research Oslo University Hospital  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Corina Silvia","family":"Rueegg","sequence":"additional","affiliation":[{"name":"Oslo Centre for Biostatistics and Epidemiology Oslo University Hospital  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u00e5l Andr\u00e9","family":"Holme","sequence":"additional","affiliation":[{"name":"Department of Haematology Oslo University Hospital  Oslo Norway"},{"name":"Institute of Clinical Medicine University of Oslo  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,2]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1182\/blood-2015-01-528414"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/hae.14046"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/hae.12118"},{"key":"e_1_2_10_5_1","unstructured":"World Health Organization.Guidelines on physical activity and sedentary behaviour. 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