{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T16:13:18Z","timestamp":1790957598330,"version":"4.1.0"},"reference-count":38,"publisher":"BMJ","issue":"1","funder":[{"name":"The Faculty of Medicine Lund University"},{"name":"Free Professional Support Fund from The Swedish Association of Physiotherapists"},{"DOI":"10.13039\/501100005350","name":"Swedish Research Council for Sport Science","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100005350","id-type":"DOI","asserted-by":"crossref"}]},{"name":"The Crafoord foundation"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open Sport Exerc Med"],"accepted":{"date-parts":[[2017,3,1]]},"published-print":{"date-parts":[[2017,4]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>The role of lower extremity (LE) muscle strength for predicting traumatic knee injury in youth athletes is largely unknown.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Aims<\/jats:title>\n                  <jats:p>The aim was to investigate the influence of LE muscle strength on traumatic knee injury in youth female and male athletes.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>225 athletes (40% females) from sport senior high schools in Sweden were included in this case\u2013control study. The athletes recorded any traumatic knee injury that had occurred during their high-school period in a web-based injury form. A one repetition maximum (1RM) barbell squat test was used to measure LE muscle strength. The 1RM was dichotomised to analyse \u2018weak\u2019 versus \u2018strong\u2019 athletes according to the median (weak<jats:sub>median<\/jats:sub> vs strong<jats:sub>median<\/jats:sub>).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>63 traumatic knee injuries, including 18 ACL injuries, were registered. The majority of injured female athletes were in the weak group compared with the strong group (p=0.0001). The odds of sustaining a traumatic knee injury and an ACL injury was 9.5 times higher and 7 times higher, respectively, in the weak<jats:sub>median<\/jats:sub> group compared with the strong<jats:sub>median<\/jats:sub> group in females (p\u2009\u22640.011). A relative 1RM squat \u22641.05\u2009kg (105% of bodyweight) was established as the best cut-off value to distinguish high versus low risk of injury in female athletes. No strength\u2013injury relationships were observed for the male athletes (p\u2009\u22650.348).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Weaker LE muscle strength predicted traumatic knee injury in youth female athletes, but not in males. This suggests that LE muscle strength should be included in injury screening in youth female athletes.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/bmjsem-2017-000222","type":"journal-article","created":{"date-parts":[[2017,4,17]],"date-time":"2017-04-17T20:10:11Z","timestamp":1492459811000},"page":"e000222","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":54,"title":["Weaker lower extremity muscle strength predicts traumatic knee injury in youth female but not male athletes"],"prefix":"10.1136","volume":"3","author":[{"given":"Sofia","family":"Ryman Augustsson","sequence":"first","affiliation":[{"name":"Department of Health Sciences, Musculoskeletal Function, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva","family":"Ageberg","sequence":"additional","affiliation":[{"name":"Department of Health Sciences, Musculoskeletal Function, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2017,4,16]]},"reference":[{"key":"2025083109385023000_3.1.e000222.1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546512449306"},{"key":"2025083109385023000_3.1.e000222.2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-010-1170-9"},{"key":"2025083109385023000_3.1.e000222.3","doi-asserted-by":"publisher","DOI":"10.1177\/0363546504269591"},{"key":"2025083109385023000_3.1.e000222.4","doi-asserted-by":"publisher","DOI":"10.1177\/0363546515625048"},{"key":"2025083109385023000_3.1.e000222.5","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2014-094573"},{"key":"2025083109385023000_3.1.e000222.6","doi-asserted-by":"publisher","DOI":"10.1016\/j.jelekin.2008.08.004"},{"key":"2025083109385023000_3.1.e000222.7","doi-asserted-by":"publisher","DOI":"10.1097\/JSM.0b013e318190bddb"},{"key":"2025083109385023000_3.1.e000222.8","doi-asserted-by":"publisher","DOI":"10.1177\/0363546515616237"},{"key":"2025083109385023000_3.1.e000222.9","doi-asserted-by":"publisher","DOI":"10.1177\/0363546513518741"},{"key":"2025083109385023000_3.1.e000222.10","doi-asserted-by":"crossref","first-page":"737","DOI":"10.1007\/s00167-015-3922-z","article-title":"Risk factors for acute knee injury in female youth football","volume":"24","author":"H\u00e4gglund","year":"2016","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"key":"2025083109385023000_3.1.e000222.11","doi-asserted-by":"publisher","DOI":"10.1177\/0363546514541224"},{"key":"2025083109385023000_3.1.e000222.12","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505281242"},{"key":"2025083109385023000_3.1.e000222.13","unstructured":"STROBE statement. 2007 http:\/\/www.strobe-statement.org\/?id=available-checklists (accessed Jul 2016)."},{"key":"2025083109385023000_3.1.e000222.14","unstructured":"Fysprofilen\u2122 http:\/\/fysprofilen.se\/sv\/default.aspx?PageID=10662016 (accessed Nov 2016)."},{"key":"2025083109385023000_3.1.e000222.15","unstructured":"Riksidrottsf\u00f6rbundet. 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