{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T19:13:48Z","timestamp":1790018028146,"version":"4.0.1"},"reference-count":56,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2025,6,14]],"date-time":"2025-06-14T00:00:00Z","timestamp":1749859200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Sports Health: A Multidisciplinary Approach"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Biomechanical asymmetries after anterior cruciate ligament reconstruction (ACLR) may be amplified and perpetuated by progressing athletes to higher-demand tasks despite impairments in lower-demand tasks.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypotheses:<\/jats:title>\n                    <jats:p>(1) Between-limb asymmetries in limb loading and joint kinetics will be greater during the higher-demand drop jump compared with squatting. (2) Asymmetries in limb loading and joint kinetics during squatting will be associated with asymmetries during drop jump.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Descriptive laboratory study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence:<\/jats:title>\n                    <jats:p>Level 4.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>A total of 22 (11 female) participants after primary ACLR (6.4 \u00b1 0.5 months) performed bilateral squat and drop jump tasks. Vertical ground-reaction force (vGRF), knee and hip extensor net joint moments (NJMs), hip\/knee mean NJM ratio, and limb symmetry index (LSI) were calculated during the eccentric phase. Comparisons between limbs and across tasks were analyzed using 2-way repeated measures analyses of variance. Pearson\u2019s correlations assessed associations between vGRF and NJM LSIs, and hip\/knee NJM ratios across tasks.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Mean vGRF LSI and knee NJM LSI were significantly more asymmetric during drop jump compared with squatting (79.7 \u00b1 14.9 vs 90.0 \u00b1 11.0%,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; 0.001 and 55.8 \u00b1 17.6 vs 66.4 \u00b1 25.6%,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.02, respectively). Mean vGRF LSI (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.58;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.004) and knee NJM LSI (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.61;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.002) were moderately correlated between tasks. The hip\/knee ratio for the ACLR limb correlated strongly between tasks (\n                      <jats:italic toggle=\"yes\">r<\/jats:italic>\n                      = 0.69;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; 0.001); nonsurgical limb: r = 0.39; P = 0.07).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Underloading and reduced functional use of the ACLR knee were amplified during the drop jump compared with squatting. Limb mechanics during lower-demand squatting are informative of performance during drop jump.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance:<\/jats:title>\n                    <jats:p>Criterion-based rehabilitation guidelines may benefit from requiring symmetry in lower-demand tasks before progressing to higher-level activities to optimize recovery and reduce risk of reinjury.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/19417381251343092","type":"journal-article","created":{"date-parts":[[2025,6,15]],"date-time":"2025-06-15T01:21:44Z","timestamp":1749950504000},"page":"145-153","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Association of Loading Asymmetry During Squatting With Loading Asymmetry During Drop Jump After ACL Reconstruction: Implications for Rehabilitation Progression"],"prefix":"10.1177","volume":"18","author":[{"suffix":"Jr.","given":"John M.","family":"Popovich","sequence":"first","affiliation":[{"name":"Center for Neuromusculoskeletal Clinical Research, Department of Osteopathic Manipulative Medicine, College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liang-Ching","family":"Tsai","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Georgia State University, Atlanta, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marisa","family":"Brito","sequence":"additional","affiliation":[{"name":"Division of Physical Therapy, Center for Physical Therapy and Movement Science, Emory University School of Medicine, Atlanta, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John W.","family":"Xerogeanes","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, Emory University, Atlanta, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0954-0447","authenticated-orcid":false,"given":"Mark A.","family":"Lyle","sequence":"additional","affiliation":[{"name":"Division of Physical Therapy, Center for Physical Therapy and Movement Science, Emory University School of Medicine, Atlanta, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,6,14]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199006000-00028"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546514552630"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/jor.24489"},{"issue":"1","key":"e_1_3_2_5_2","first-page":"84","article-title":"A technical report on the development of a real-time visual biofeedback system to optimize motor learning and movement deficit correction","volume":"19","author":"Bonnette S","year":"2020","unstructured":"Bonnette S, DiCesare CA, Kiefer AW, et al. 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