{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T07:09:56Z","timestamp":1789628996352,"version":"build-2803163510"},"reference-count":39,"publisher":"National Athletic Trainers' Association","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015,6,1]]},"abstract":"<jats:sec>\n                  <jats:title>Context<\/jats:title>\n                  <jats:p>Individuals with a history of anterior cruciate ligament reconstruction (ACLR) are at greater risk of reinjury and developing early-onset osteoarthritis due to persistent abnormal joint loading. Real-time clinical assessment tools may help identify patients experiencing abnormal movement patterns after ACLR.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>To compare performance on the Landing Error Scoring System (LESS) between participants with ACLR and uninjured control participants and to determine the relationship between LESS score and knee-extension strength in these participants.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Design<\/jats:title>\n                  <jats:p>Controlled laboratory study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Setting<\/jats:title>\n                  <jats:p>Research laboratory.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Patients or Other Participants<\/jats:title>\n                  <jats:p>Forty-six recreationally active participants, consisting of 22 with ACLR (12 men, 10 women; age = 22.5 \u00b1 5.0 years, height = 172.8 \u00b1 7.2 cm, mass = 74.2 \u00b1 15.6 kg, body mass index = 24.6 \u00b1 4.0) and 24 healthy control participants (12 men, 12 women; age = 21.7 \u00b1 3.6 years, height = 168.0 \u00b1 8.8 cm, mass = 69.2 \u00b1 13.6 kg, body mass index = 24.3 \u00b1 3.2) were enrolled.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Main Outcome Measure(s)<\/jats:title>\n                  <jats:p>Bilateral normalized knee-extension maximal voluntary isometric contraction (MVIC) torque (Nm\/kg) and LESS scores were measured during a single testing session. We compared LESS scores between groups using a Mann-Whitney U test and the relationships between LESS scores and normalized knee-extension MVIC torque using Spearman \u03c1 bivariate correlations.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The ACLR participants had a greater number of LESS errors (6.0 \u00b1 3.6) than healthy control participants (2.8 \u00b1 2.2; t44 = \u22123.73, P = .002). In ACLR participants, lower normalized knee-extension MVIC torque in the injured limb (\u03c1 = \u22120.455, P = .03) was associated with a greater number of landing errors.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Participants with ACLR displayed more errors while landing. The occurrence of landing errors was negatively correlated with knee-extension strength, suggesting that weaker participants had more landing errors. Persistent quadriceps weakness commonly associated with ACLR may be related to a reduced quality of lower extremity movement during dynamic tasks.<\/jats:p>\n               <\/jats:sec>","DOI":"10.4085\/1062-6050-50.2.11","type":"journal-article","created":{"date-parts":[[2015,5,15]],"date-time":"2015-05-15T15:22:20Z","timestamp":1431703340000},"page":"596-602","source":"Crossref","is-referenced-by-count":33,"title":["Drop-Landing Performance and Knee-Extension Strength After Anterior Cruciate Ligament Reconstruction"],"prefix":"10.4085","volume":"50","author":[{"given":"Christopher M.","family":"Kuenze","sequence":"first","affiliation":[{"name":"Department of Kinesiology and Sport Sciences, University of Miami, FL;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nathaniel","family":"Foot","sequence":"first","affiliation":[{"name":"Department of Kinesiology, University of Virginia, Charlottesville"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susan 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