{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T15:03:21Z","timestamp":1761491001070,"version":"3.44.0"},"reference-count":22,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open Sport Exerc Med"],"accepted":{"date-parts":[[2018,3,30]]},"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>The high physical load associated with running through uneven terrain contributes toorienteerers being exposed to high injury risk, where the majority of injuries are located in the lower extremities. Specific training programmes have been effective at reducing injury risk in sports. Yet no trial has been conducted in elite orienteering. The aim of this study is to investigate the effectiveness of a specific training programme in preventing lower extremity injury in adult elite orienteerers.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Study design<\/jats:title>\n                  <jats:p>Randomised controlled trial (RCT).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Seventy-two Swedish elite orienteerers, aged 18\u201340 years, are allocated to an intervention or control group. The intervention group performs four specific exercises, with three difficult levels intensified every second week over the first 4\u2009weeks, targeting strength, flexibility and coordination of the lower extremity. The exercises are completed four times a week (10\u2009min per session) in conjunction with normal training over 14 weeks. Injury data are collected every second week using a valid injury questionnaire distributed by text messages over 14 weeks. The primary outcome is number of substantial injuries in the lower extremity. The secondary outcomes are incidence of ankle sprains and the average substantial injury prevalence across 14 weeks.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Discussion<\/jats:title>\n                  <jats:p>Due to high injury risk and lack of injury prevention trials in orienteering, an RCT investigating the effect of a specific exercise programme in preventing lower extremity injury is warranted. The results of this trial will be beneficial to orienteerers, clubs and federations, and increase our understanding on how lower extremity injuries can be prevented in a physically challenging sport.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Trial registration number<\/jats:title>\n                  <jats:p>\n                     <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT00359424\">NCT03408925<\/jats:ext-link>.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/bmjsem-2018-000347","type":"journal-article","created":{"date-parts":[[2020,5,7]],"date-time":"2020-05-07T19:54:36Z","timestamp":1588881276000},"page":"e000347","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Preventing lower extremity injury in elite orienteerers: study protocol for a randomised controlled trial"],"prefix":"10.1136","volume":"4","clinical-trial-number":[{"clinical-trial-number":"nct03408925","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct03408925","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Philip","family":"von Rosen","sequence":"first","affiliation":[{"name":"Department of Neurobiology, Care Sciences, and Society (NVS) Division of Physiotherapy, Karolinska Institutet, Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bodil","family":"Halvarsson","sequence":"additional","affiliation":[{"name":"Department of Neurobiology, Care Sciences, and Society (NVS) Division of Physiotherapy, Karolinska Institutet, Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2018,4,20]]},"reference":[{"key":"2025083111063570000_4.1.e000347.1","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199724060-00005"},{"key":"2025083111063570000_4.1.e000347.2","doi-asserted-by":"crossref","first-page":"822","DOI":"10.26603\/ijspt20170822","article-title":"Injury patterns in adolescent elite endurance athletes participating in running, orienteering, and cross-country skiing","volume":"12","author":"von Rosen","year":"2017","journal-title":"Int J Sports Phys Ther"},{"key":"2025083111063570000_4.1.e000347.3","first-page":"3","article-title":"The incidence of ankle sprains in orienteering","volume":"6","author":"Ekstrand","year":"1990","journal-title":"Sci J Orienteering"},{"key":"2025083111063570000_4.1.e000347.4","doi-asserted-by":"crossref","first-page":"321","DOI":"10.4085\/1062-6050-51.5.01","article-title":"Injuries and associated risk factors among adolescent elite orienteerers: a 26-week prospective registration study","volume":"51","author":"von Rosen","year":"2016","journal-title":"J Athl Train"},{"key":"2025083111063570000_4.1.e000347.5","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.20.3.125"},{"key":"2025083111063570000_4.1.e000347.6","doi-asserted-by":"publisher","DOI":"10.1177\/036354658601400515"},{"key":"2025083111063570000_4.1.e000347.7","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.31.3.205"},{"key":"2025083111063570000_4.1.e000347.8","doi-asserted-by":"crossref","first-page":"259531","DOI":"10.1155\/2015\/259531","article-title":"Musculoskeletal injuries and training patterns in junior elite orienteering athleletal Injuries and Training Patterns in Junior Elite Orienteering Athletes","volume":"2015","author":"Roos","year":"2015","journal-title":"Biomed Res Int"},{"key":"2025083111063570000_4.1.e000347.9","first-page":"72","article-title":"Injuries in orienteering. 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