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Injured leg knee extensor and flexor concentric peak torque (isokinetic; 90 deg\/s), triple hop distance, modified Y-balance test (YBT), and Knee injury and Osteoarthritis Outcome Score Sport subscale (KOOS\n                      <jats:sub>sport<\/jats:sub>\n                      ) were assessed at baseline (\u22644 months postinjury) and 6 and 12 months later. Adjusted associations between 6- and 12-month change in strength and functional measures were assessed using multivariable regression (95% CI).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Based on data from 106 participants (16.2 \u00b1 1.8 years old), a 1 Nm increase in knee extensor strength (6-12 months) was associated with a 0.9 cm (95% CI, \u20130.5, 2.3) increase in hop distance. Similarly, every 1 Nm increase in knee flexor strength (6-12 months) was associated with a 0.3 cm (95% CI, \u20131.1, 1.7) increase in hop distance. Across other models, a 1 Nm increase in extensor or flexor strength was associated with a 0- to 0.3-point increase in KOOS\n                      <jats:sub>sport<\/jats:sub>\n                      score.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>There was minimal-to-no longitudinal relationship between changes in knee extensor or flexor strength and changes in triple hop or YBT performance, or self-reported function within the first year after a youth sport-related knee injury.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/19417381251352524","type":"journal-article","created":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:26:01Z","timestamp":1753874761000},"page":"298-306","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Are Changes in Thigh Muscle Concentric Strength Associated With Changes in Leg Function After a Youth Sport-Related Knee Injury?"],"prefix":"10.1177","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5135-1191","authenticated-orcid":false,"given":"Justin M.","family":"Losciale","sequence":"first","affiliation":[{"name":"Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"},{"name":"Arthritis Research Canada, Vancouver, British Columbia, Canada"},{"name":"Edwin S.H. Leong Centre for Healthy Aging, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"},{"name":"Informatics, Decision-Enhancement, and Analytic Sciences Center of Innovation, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah"},{"name":"Division of Epidemiology, Department Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina Y.","family":"Le","sequence":"additional","affiliation":[{"name":"Carnegie School of Sport, Leeds Beckett University, Leeds, UK"},{"name":"Football Players Worldwide (FIFPRO), Hoofddorp, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linda K.","family":"Truong","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"},{"name":"Arthritis Research Canada, Vancouver, British Columbia, Canada"},{"name":"Centre for Aging SMART, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Garrett S.","family":"Bullock","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery and Rehabilitation, Wake Forest University School of Medicine, Winston-Salem, North Carolina"},{"name":"Department of Biostatistics and Data Science, Wake Forest University School of Medicine, Winston, Salem, North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cameron J.","family":"Mitchell","sequence":"additional","affiliation":[{"name":"School of Kinesiology, Faculty of Education, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael A.","family":"Hunt","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"},{"name":"Centre for Aging SMART, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6591-4976","authenticated-orcid":false,"given":"Jackie L.","family":"Whittaker","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"},{"name":"Arthritis Research Canada, Vancouver, British Columbia, Canada"},{"name":"Centre for Aging SMART, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,7,30]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510361218"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.332.7549.1080"},{"key":"e_1_3_2_4_2","unstructured":"Arel-Bundock V. 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