{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T09:14:06Z","timestamp":1785575646144,"version":"3.56.0"},"reference-count":35,"publisher":"Journal of Orthopaedic & Sports Physical Therapy (JOSPT)","issue":"7","content-domain":{"domain":["www.jospt.org"],"crossmark-restriction":true},"short-container-title":["Journal of Orthopaedic &amp; Sports Physical Therapy"],"published-print":{"date-parts":[[2021,7]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p> To determine whether visually assessed performances of the single-leg squat (SLS) and vertical drop jump (VDJ) were associated with future noncontact anterior cruciate ligament (ACL) injury. <\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p> Prognostic accuracy cohort study. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> Elite female handball and football (soccer) athletes (n = 880) were tested from 2007 to 2014 and tracked through 2015. Trained physical therapists visually rated each leg during a SLS and overall control during a VDJ. Receiver operating characteristic curve, Pearson chi-square, and logistic regression analyses were used to determine the prognostic accuracy of the 2 screening tests. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Sixty-five noncontact ACL injuries occurred during the follow-up period. Fourteen percent of athletes who sustained an ACL injury had poor SLS performance, compared to 17% of the noninjured athletes (P = .52 and .67 for hip and knee ratings, respectively). Side-to-side asymmetry in the SLS was not different between injured and noninjured athletes (P = .10 and .99 for hip and knee asymmetry, respectively). Twenty-one percent of athletes who sustained an ACL injury had a poor VDJ rating, compared to 27% of the noninjured athletes (P = .09). Furthermore, area under the curve values ranged from 0.43 to 0.54 for the SLS and VDJ, demonstrating no to poor prognostic accuracy. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p> Neither SLS nor VDJ test performance distinguished between athletes who sustained a subsequent noncontact ACL injury and those who did not. J Orthop Sports Phys Ther 2021;51(7):372\u2013378. doi:10.2519\/jospt.2021.10170 <\/jats:p><\/jats:sec>","DOI":"10.2519\/jospt.2021.10170","type":"journal-article","created":{"date-parts":[[2021,7,1]],"date-time":"2021-07-01T06:16:20Z","timestamp":1625120180000},"page":"372-378","update-policy":"https:\/\/doi.org\/10.2519\/jospt.crossmarkpolicy","source":"Crossref","is-referenced-by-count":37,"title":["Drop Jump? Single-Leg Squat? 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