{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T19:26:01Z","timestamp":1787599561055,"version":"build-2736575974"},"reference-count":40,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T00:00:00Z","timestamp":1778716800000},"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":[[2026,9]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>After anterior cruciate ligament reconstruction (ACLR), the single-leg squat test (SLST) may be included in an initial\/baseline performance testing battery. During the SLST, the position of the nonstance limb is known to affect the biomechanics\/kinematics of the test, making SLST standardization important for comparing outcomes after ACLR.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis:<\/jats:title>\n                    <jats:p>The position of the nonstance limb during the SLST will influence the correlation between peak knee flexion limb-symmetry index (LSI) and quadriceps strength LSI, and affect lower extremity biomechanics during the SLST.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Biomechanical cohort study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence:<\/jats:title>\n                    <jats:p>Level 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>A total of 66 athletes completed quadriceps strength and single-leg squat testing 5 to 7\u2009months after ACLR. Based on their nonstance limb position during the SLST, athletes were placed in either a posterior standardization (PS) or neutral standardization (NS) group for biomechanical analyses. Correlations between peak knee flexion LSI during the SLST and quadriceps strength LSI were investigated, and between- and within-group analyses of lower extremity joint biomechanics were completed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Performing the SLST with PS produced a medium correlation between peak knee flexion LSI and quadriceps strength LSI (\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      \u2009=\u20090.37,\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      <jats:sup>2<\/jats:sup>\n                      \u2009=\u20090.14), whereas NS produced a small correlation (\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      \u2009=\u20090.27,\n                      <jats:italic toggle=\"yes\">R<\/jats:italic>\n                      <jats:sup>2<\/jats:sup>\n                      \u2009=\u20090.07). In both groups, the surgical limb showed significantly less peak knee flexion (PS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.02) (NS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.03) and knee moment-contribution (PS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.04) (NS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.0001), as well as significantly more hip moment-contribution (PS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.03) (NS;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20090.0001). Surgical limb change in anterior center of pressure was significantly greater with NS relative to PS (P\u2009=\u20090.03), and nonsurgical limb ankle moment-contribution was significantly greater with PS relative to NS (P\u2009=\u20090.02).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Although surgical limb knee moment contribution is reduced significantly in both groups after ACLR, peak knee flexion LSI may be a better indicator of\u2009quadriceps strength LSI\u2009during the SLST with PS than with\u2009NS.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance:<\/jats:title>\n                    <jats:p>After ACLR, single-leg squatting with PS may be preferred for knee-specific performance testing and as an exercise regression for horizontal hopping, whereas NS may be preferred as an exercise regression for vertical hopping. Strength-of-Recommendation Taxonomy (SORT): B-level recommendation (biomechanical, Level 3 cohort study).<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/19417381261440535","type":"journal-article","created":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T06:24:15Z","timestamp":1778826255000},"page":"1035-1046","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Quadriceps Strength Correlations and Biomechanical Differences During the Single-Leg Squat Test With Posterior Versus Neutral Standardization After ACL Reconstruction"],"prefix":"10.1177","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1747-327X","authenticated-orcid":false,"given":"Braidy S.","family":"Solie","sequence":"first","affiliation":[{"name":"Training HAUS, Twin Cities Orthopedics, Eagan, Minnesota"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5777-8698","authenticated-orcid":false,"given":"Garrett","family":"Eggleston","sequence":"additional","affiliation":[{"name":"Training HAUS, Twin Cities Orthopedics, Eagan, Minnesota"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole","family":"Greufe (Schwery)","sequence":"additional","affiliation":[{"name":"Training HAUS, Twin Cities Orthopedics, Eagan, Minnesota"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2189-3544","authenticated-orcid":false,"given":"Uchenna","family":"Ogbonnaya","sequence":"additional","affiliation":[{"name":"Training HAUS, Twin Cities Orthopedics, Eagan, Minnesota"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher M.","family":"Larson","sequence":"additional","affiliation":[{"name":"Twin Cities Orthopedics, Edina, Minnesota"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,5,14]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2018-100310"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.gaitpost.2018.02.016"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546519886291"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2018-099982"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2021.01.031"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.4324\/9780203771587"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546510395456"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s40279-019-01221-7"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.4085\/1062-6050-50.9.03"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2023-107536"},{"key":"e_1_3_3_12_2","doi-asserted-by":"publisher","DOI":"10.1177\/2325967115575900"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01560215"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.3390\/app14083143"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13102-022-00523-0"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.1123\/jab.2022-0204"},{"issue":"2","key":"e_1_3_3_17_2","first-page":"201","article-title":"Not all single leg squats are equal: a biomechanical comparison of three variations","volume":"11","author":"Khuu A","year":"2016","unstructured":"Khuu A, Foch E, Lewis CL. 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