{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T00:13:33Z","timestamp":1791591213701,"version":"4.3.4"},"reference-count":49,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,4,9]],"date-time":"2025-04-09T00:00:00Z","timestamp":1744156800000},"content-version":"vor","delay-in-days":8,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/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\/501100006356","name":"Syddansk Universitet","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100006356","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>We aimed to assess the in\u2010season weekly average prevalence proportion, the incidence rate, and burden (the product of incidence rate and duration of injury in weeks) of health problems among Danish youth handball community players aged 11\u201317. In this 30\u2010week prospective cohort study, players self\u2010reported health problems, including all injuries and illnesses, regardless of time loss or medical attention, and handball exposure using weekly web\u2010based surveys (OSTRC\u2010H2). Sex differences were estimated using Poisson regression (incidence rates) and binomial regression (weekly average prevalence proportions) with clustered robust standard errors. We included 945 players (age: 14.5\u2009\u00b1\u20091.5\u2009years; 55% female) from 20 clubs across Denmark. The response proportion to the weekly questionnaires was 63% (range: 42%\u201379%). The average prevalence proportion of health problems was 23% (95% CI 21%\u201325%), with 17% (95% CI 15%\u201319%) attributable to injuries and 6% (95% CI 5%\u20137%) to illnesses. The overall incidence rate was 14.9 (95% CI 13.9\u201315.9)\/1000\u2009h. Female players aged 13\u201315 showed a higher incidence rate (15.9 [95% CI 14.2\u201317.8]\/1000\u2009h) compared to age\u2010matched males (13.2 [95% CI 11.5\u201315.1]\/1000\u2009h), with an incidence rate ratio of 1.21 [95% CI 1.0\u20131.4], and had a higher weekly average prevalence proportion (23% [95% CI 19%\u201327%]) than age\u2010matched males (12% [95% CI 10%\u201315%]), corresponding to a difference of 10% points [95% CI 6%\u201315% points]. COVID\u201019 infection accounted for 36% of reported illnesses. Our findings highlight the need for injury prevention initiatives to address both sudden\u2010onset and gradual\u2010onset injuries in youth handball players. Sex differences in injury measures and the potential link between illness and injury risk warrant further investigation.<\/jats:p>","DOI":"10.1111\/sms.70048","type":"journal-article","created":{"date-parts":[[2025,4,9]],"date-time":"2025-04-09T05:57:51Z","timestamp":1744178271000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Health Problems in Danish Adolescent Handball Players: Findings From the One\u2010Season Health and Performance Promotion in Youth Sport (\n                    <scp>HAPPY<\/scp>\n                    ) Study of 945 Players Aged 11\u201317\u2009Years"],"prefix":"10.1111","volume":"35","author":[{"given":"Anders Christer","family":"Larsen","sequence":"first","affiliation":[{"name":"Research Unit of Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, the Faculty of Health Sciences University of Southern Denmark  Odense 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Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, the Faculty of Health Sciences University of Southern Denmark  Odense Denmark"},{"name":"Department of Physiotherapy and Occupational Therapy Copenhagen University Hospital  Herlev Gentofte Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Louise Kamuk","family":"Storm","sequence":"additional","affiliation":[{"name":"Research Unit of Psychology of Sport, Excellence and Health, Department of Sports Science and Clinical Biomechanics, The Faculty of Health Sciences University of Southern Denmark  Odense Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alice","family":"Kongsted","sequence":"additional","affiliation":[{"name":"Research Unit of Clinical Biomechanics, Department of Sports Science and Clinical Biomechanics, The Faculty of Health Sciences University of Southern Denmark  Odense Denmark"},{"name":"The Chiropractic Knowledge Hub  Odense 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