@article{7e7a38f59f1c405da76d18d5c2e90b4a,
title = "There is no relationship between lower extremity alignment during unilateral and bilateral drop jumps and the risk of knee or ankle injury: A prospective study",
abstract = "OBJECTIVE: To investigate the association between lower extremity alignment during unilateral and bilateral drop jump tests and the risk of acute noncontact knee or ankle injuries in young team sport athletes. DESIGN: Prospective cohort study. METHODS: A 2-dimensional video analysis was used to measure the frontal plane knee projection angle in the single-leg vertical drop jump (VDJ) and the bilateral VDJ in young team sport athletes. Out of the 364 athletes (187 male, 177 female), 189 played basketball and 175 played floorball. RESULTS: Six male athletes sustained knee injuries and 23 sustained ankle injuries. Frontal plane knee projection angle in the single-leg VDJ or the bilateral VDJ was not associated with ankle injuries among male athletes. No statistical analysis was performed for the knee injuries. Among female athletes, 28 sustained knee and 41 sustained ankle injuries. Frontal plane knee projection angle during the single-leg VDJ or the bilateral VDJ was not a risk factor for knee or ankle injuries. CONCLUSION: Lower extremity alignment during unilateral and bilateral drop jump tests was not associated with future noncontact knee or ankle injuries among young team sport athletes. The findings should be interpreted cautiously due to the small number of injuries.",
keywords = "Landing, Movement control, Risk factors, Screening tool, Valgus",
author = "R{\"a}is{\"a}nen, {Anu M.} and Tanja Kulmala and Jari Parkkari and Tommi Vasankari and Pekka Kannus and Tron Krosshaug and Kujala, {Urho M.} and Ari Heinonen and Johanna Vesanto and Kati Pasanen",
note = "Funding Information: 1Sport Injury Prevention Research Centre Faculty of Kinesiology, University of Calgary, Calgary, Canada. 2UKK Institute for Health Promotion Research, Tampere, Finland. 3Tampere Research Center of Sport Medicine, UKK Institute for Health Promotion Research, Tampere, Finland. 4Tampere University Hospital, Tampere, Finland. 5Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway. 6Faculty of Sport and Health Sciences, University of Jyv{\"a}skyl{\"a}, Jyv{\"a}skyl{\"a}, Finland. 7Alberta Children{\textquoteright}s Hospital Research Institute, University of Calgary, Calgary, Canada. 8McCaig Institute for Bone and Joint Health, Cumming School of Medicine, University of Calgary, Calgary, Canada. The study was approved by the Ethics Committee of Pirkanmaa Hospital District (ETL code R10169). This study was financially supported by the Finnish Ministry of Education and Culture and the Competitive State Research Financing of the Expert Responsibility Area of Tampere University Hospital (grants 9N053, 9S047, and 9T046). The authors certify that they have no affiliations with or financial involvement in any organization or entity with a direct financial interest in the subject matter or materials discussed in the article. Address correspondence to Dr Anu M. R{\"a}is{\"a}nen, Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4 Canada. E-mail: Anu.raisanen@ucalgary.ca U Copyright 2020 Journal of Orthopaedic & Sports Physical Therapy{\textregistered} Publisher Copyright: {\textcopyright} 2020 Journal of Orthopaedic & Sports Physical Therapy. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = may,
doi = "10.2519/jospt.2020.9247",
language = "English",
volume = "50",
pages = "267--274",
journal = "JOURNAL OF ORTHOPAEDIC AND SPORTS PHYSICAL THERAPY",
issn = "0190-6011",
number = "5",
}
