{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T03:12:33Z","timestamp":1778814753337,"version":"3.51.4"},"reference-count":43,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-017"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-012"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-004"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Physical Therapy in Sport"],"published-print":{"date-parts":[[2026,5]]},"DOI":"10.1016\/j.ptsp.2026.101924","type":"journal-article","created":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T23:26:47Z","timestamp":1776468407000},"page":"101924","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":1,"special_numbering":"C","title":["Limb underloading and reduced functional use of the knee during the squat is linked to reduced jumping performance in athletes six months after anterior cruciate ligament reconstruction"],"prefix":"10.1016","volume":"79","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4082-2634","authenticated-orcid":false,"given":"Yi-Ju","family":"Tsai","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5109-3655","authenticated-orcid":false,"given":"Liang-Ching","family":"Tsai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4523-0972","authenticated-orcid":false,"given":"Peter","family":"Sprague","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0954-0447","authenticated-orcid":false,"given":"Mark A.","family":"Lyle","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"issue":"6","key":"10.1016\/j.ptsp.2026.101924_bib1","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1177\/1941738120912846","article-title":"One in 5 athletes sustain reinjury upon return to high-risk sports after ACL reconstruction: A systematic review in 1239 athletes younger than 20 years","volume":"12","author":"Barber-Westin","year":"2020","journal-title":"Sport Health"},{"issue":"3","key":"10.1016\/j.ptsp.2026.101924_bib2","doi-asserted-by":"crossref","first-page":"598","DOI":"10.1002\/jor.24489","article-title":"Quadriceps muscle size following ACL injury and reconstruction: A systematic review","volume":"38","author":"Birchmeier","year":"2020","journal-title":"Journal of Orthopaedic Research"},{"issue":"8","key":"10.1016\/j.ptsp.2026.101924_bib3","doi-asserted-by":"crossref","first-page":"1626","DOI":"10.1249\/MSS.0000000000001956","article-title":"Loading behaviors do not match loading abilities postanterior cruciate ligament reconstruction","volume":"51","author":"Chan","year":"2019","journal-title":"Medicine & Science in Sports & Exercise"},{"key":"10.1016\/j.ptsp.2026.101924_bib4","doi-asserted-by":"crossref","DOI":"10.1016\/j.jsams.2023.08.165","article-title":"Vertical jump testing following anterior cruciate ligament reconstruction: A systematic review and meta-analysis","volume":"26","author":"Dutaillis","year":"2023","journal-title":"Journal of Science and Medicine in Sport"},{"issue":"8","key":"10.1016\/j.ptsp.2026.101924_bib5","doi-asserted-by":"crossref","first-page":"1983","DOI":"10.1519\/JSC.0b013e3181e72466","article-title":"Using the reactive strength index modified to evaluate plyometric performance","volume":"24","author":"Ebben","year":"2010","journal-title":"The Journal of Strength & Conditioning Research"},{"key":"10.1016\/j.ptsp.2026.101924_bib6","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1016\/j.clinbiomech.2015.09.020","article-title":"Identification of preferred landing leg in athletes previously injured and uninjured: A brief report","volume":"31","author":"Ford","year":"2016","journal-title":"Clinical Biomechanics"},{"issue":"6","key":"10.1016\/j.ptsp.2026.101924_bib7","doi-asserted-by":"crossref","first-page":"788","DOI":"10.1177\/19417381231160167","article-title":"Clinical outcomes after ACL reconstruction in soccer (football, futbol) players: A systematic review and meta-analysis","volume":"15","author":"Hong","year":"2023","journal-title":"Sport Health"},{"issue":"6","key":"10.1016\/j.ptsp.2026.101924_bib8","doi-asserted-by":"crossref","DOI":"10.1177\/23259671231182105","article-title":"Interlimb asymmetry in knee extension moment during double-leg squatting is associated with persistent quadriceps weakness after ACL reconstruction","volume":"11","author":"Ishida","year":"2023","journal-title":"Orthopaedic Journal of Sports Medicine"},{"issue":"11","key":"10.1016\/j.ptsp.2026.101924_bib9","doi-asserted-by":"crossref","first-page":"2608","DOI":"10.1177\/0363546519864688","article-title":"Change in drop-landing mechanics over 2 years in young athletes after anterior cruciate ligament reconstruction","volume":"47","author":"Ithurburn","year":"2019","journal-title":"The American Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2026.101924_bib10","doi-asserted-by":"crossref","first-page":"520","DOI":"10.1016\/j.knee.2021.02.036","article-title":"Young athletes after ACL reconstruction with asymmetric quadriceps strength at the time of return-to-sport clearance demonstrate drop-landing asymmetries two years later","volume":"29","author":"Ithurburn","year":"2021","journal-title":"The Knee"},{"issue":"20","key":"10.1016\/j.ptsp.2026.101924_bib11","doi-asserted-by":"crossref","first-page":"1304","DOI":"10.1136\/bjsports-2022-106588","article-title":"Performance and symmetry measures during vertical jump testing at return to sport after ACL reconstruction","volume":"57","author":"Kotsifaki","year":"2023","journal-title":"British Journal of Sports Medicine"},{"issue":"9","key":"10.1016\/j.ptsp.2026.101924_bib12","doi-asserted-by":"crossref","first-page":"490","DOI":"10.1136\/bjsports-2021-104692","article-title":"Single leg vertical jump performance identifies knee function deficits at return to sport after ACL reconstruction in male athletes","volume":"56","author":"Kotsifaki","year":"2022","journal-title":"British Journal of Sports Medicine"},{"issue":"2","key":"10.1016\/j.ptsp.2026.101924_bib13","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1177\/03635465211063192","article-title":"Symmetry in triple hop distance hides asymmetries in knee function after ACL reconstruction in athletes at return to sports","volume":"50","author":"Kotsifaki","year":"2022","journal-title":"The American Journal of Sports Medicine"},{"issue":"2","key":"10.1016\/j.ptsp.2026.101924_bib14","doi-asserted-by":"crossref","DOI":"10.1002\/jeo2.12018","article-title":"Jumping into recovery: A systematic review and meta\u2010analysis of discriminatory and responsive force plate parameters in individuals following anterior cruciate ligament reconstruction during countermovement and drop jumps","volume":"11","author":"Labban","year":"2024","journal-title":"Journal of Experimental Orthopaedics"},{"issue":"19","key":"10.1016\/j.ptsp.2026.101924_bib15","doi-asserted-by":"crossref","first-page":"1805","DOI":"10.1080\/02640414.2014.924055","article-title":"Determinants of countermovement jump performance: A kinetic and kinematic analysis","volume":"32","author":"McErlain-Naylor","year":"2014","journal-title":"Journal of Sports Sciences"},{"issue":"2","key":"10.1016\/j.ptsp.2026.101924_bib16","doi-asserted-by":"crossref","first-page":"220","DOI":"10.1123\/ijspp.2017-0056","article-title":"Influence of the reactive strength index modified on Force- and power-time curves","volume":"13","author":"McMahon","year":"2018","journal-title":"International Journal of Sports Physiology and Performance"},{"issue":"24","key":"10.1016\/j.ptsp.2026.101924_bib17","doi-asserted-by":"crossref","first-page":"2341","DOI":"10.1056\/NEJMcp1805931","article-title":"Anterior cruciate ligament tear","volume":"380","author":"Musahl","year":"2019","journal-title":"New England Journal of Medicine"},{"issue":"3","key":"10.1016\/j.ptsp.2026.101924_bib18","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1123\/jsr.2016-0026","article-title":"Preferred hip strategy during landing reduces knee abduction moment in collegiate female soccer players","volume":"27","author":"Nguyen","year":"2018","journal-title":"Journal of Sport Rehabilitation"},{"issue":"2","key":"10.1016\/j.ptsp.2026.101924_bib19","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1302\/0301-620X.102B2.BJJ-2019-0420.R2","article-title":"Paediatric and adolescent anterior cruciate ligament reconstruction surgery: Results from a national cohort of 16,000 patients over 20 years","volume":"102","author":"Nogaro","year":"2020","journal-title":"The Bone & Joint Journal"},{"issue":"4","key":"10.1016\/j.ptsp.2026.101924_bib20","doi-asserted-by":"crossref","first-page":"258","DOI":"10.1097\/JSM.0b013e31804c77ea","article-title":"Limb asymmetries in landing and jumping 2 years following anterior cruciate ligament reconstruction","volume":"17","author":"Paterno","year":"2007","journal-title":"Clinical Journal of Sport Medicine"},{"issue":"8","key":"10.1016\/j.ptsp.2026.101924_bib21","doi-asserted-by":"crossref","first-page":"553","DOI":"10.2519\/jospt.2011.3591","article-title":"Effects of sex on compensatory landing strategies upon return to sport after anterior cruciate ligament reconstruction","volume":"41","author":"Paterno","year":"2011","journal-title":"Journal of Orthopaedic & Sports Physical Therapy"},{"issue":"10","key":"10.1016\/j.ptsp.2026.101924_bib22","doi-asserted-by":"crossref","first-page":"2638","DOI":"10.1177\/03635465211023761","article-title":"Bilateral squatting mechanics are associated with landing mechanics in anterior cruciate ligament reconstruction patients","volume":"49","author":"Peebles","year":"2021","journal-title":"The American Journal of Sports Medicine"},{"issue":"2","key":"10.1016\/j.ptsp.2026.101924_bib23","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0264144","article-title":"The association between reactive strength index and reactive strength index modified with approach jump performance","volume":"17","author":"Ple\u0161a","year":"2022","journal-title":"PLoS One"},{"issue":"9","key":"10.1016\/j.ptsp.2026.101924_bib24","doi-asserted-by":"crossref","DOI":"10.1177\/2325967117726267","article-title":"ACL injury prevention training results in modification of hip and knee mechanics during a drop-landing task","volume":"5","author":"Pollard","year":"2017","journal-title":"Orthopaedic Journal of Sports Medicine"},{"issue":"1","key":"10.1016\/j.ptsp.2026.101924_bib25","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1177\/19417381251343092","article-title":"Association of loading asymmetry during squatting with loading asymmetry during drop jump after ACL reconstruction: Implications for rehabilitation progression","volume":"18","author":"Popovich","year":"2026","journal-title":"Sport Health"},{"key":"10.1016\/j.ptsp.2026.101924_bib26","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1186\/1743-0003-11-19","article-title":"Motor control strategies during double leg squat following anterior cruciate ligament rupture and reconstruction: An observational study","volume":"11","author":"Roos","year":"2014","journal-title":"Journal of NeuroEngineering and Rehabilitation"},{"issue":"8","key":"10.1016\/j.ptsp.2026.101924_bib27","doi-asserted-by":"crossref","first-page":"1211","DOI":"10.1016\/S0003-9993(03)00034-0","article-title":"Bilateral kinematic and kinetic analysis of the squat exercise after anterior cruciate ligament reconstruction","volume":"84","author":"Salem","year":"2003","journal-title":"Archives of Physical Medicine and Rehabilitation"},{"issue":"6","key":"10.1016\/j.ptsp.2026.101924_bib28","doi-asserted-by":"crossref","first-page":"1502","DOI":"10.1177\/0363546516629944","article-title":"Incidence of anterior cruciate ligament tears and reconstruction: A 21-year population-based study","volume":"44","author":"Sanders","year":"2016","journal-title":"The American Journal of Sports Medicine"},{"issue":"1","key":"10.1016\/j.ptsp.2026.101924_bib29","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/j.arthro.2019.05.052","article-title":"High risk of further anterior cruciate ligament injury in a 10-year follow-up study of anterior cruciate ligament-reconstructed soccer players in the Swedish national knee ligament registry","volume":"36","author":"Sandon","year":"2020","journal-title":"Arthroscopy"},{"key":"10.1016\/j.ptsp.2026.101924_bib30","first-page":"1","article-title":"Relationship between jump height and lower limb joint kinetics and kinematics during countermovement jump in elite male athletes","author":"Shinchi","year":"2024","journal-title":"Sports Biomechanics"},{"issue":"9","key":"10.1016\/j.ptsp.2026.101924_bib31","doi-asserted-by":"crossref","first-page":"713","DOI":"10.2519\/jospt.2018.7977","article-title":"Compensatory strategies that reduce knee extensor demand during a bilateral squat change from 3 to 5 months following anterior cruciate ligament reconstruction","volume":"48","author":"Sigward","year":"2018","journal-title":"Journal of Orthopaedic & Sports Physical Therapy"},{"key":"10.1016\/j.ptsp.2026.101924_bib32","first-page":"1","article-title":"Jump-landing kinetic asymmetries persisted despite symmetric squat kinetics in collegiate athletes following anterior cruciate ligament reconstruction","author":"Song","year":"2023","journal-title":"Sports Biomechanics"},{"issue":"1","key":"10.1016\/j.ptsp.2026.101924_bib33","doi-asserted-by":"crossref","DOI":"10.1111\/sms.14524","article-title":"Asymmetric loading strategies during squats following anterior cruciate ligament reconstruction: A longitudinal investigation with curve analyses throughout and after rehabilitation","volume":"34","author":"Strong","year":"2024","journal-title":"Scandinavian Journal of Medicine & Science in Sports"},{"issue":"1","key":"10.1016\/j.ptsp.2026.101924_bib34","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1177\/875647939000600106","article-title":"Interpretation of the correlation coefficient: A basic review","volume":"6","author":"Taylor","year":"1990","journal-title":"Journal of Diagnostic Medical Sonography"},{"key":"10.1016\/j.ptsp.2026.101924_bib35","doi-asserted-by":"crossref","first-page":"2533","DOI":"10.1007\/s40279-017-0772-5","article-title":"Activity demands during multi-directional team sports: A systematic review","volume":"47","author":"Taylor","year":"2017","journal-title":"Sports Medicine"},{"issue":"10","key":"10.1016\/j.ptsp.2026.101924_bib36","doi-asserted-by":"crossref","first-page":"3367","DOI":"10.1007\/s00167-022-06906-7","article-title":"Time, graft, sex, geographic location, and isokinetic speed influence the degree of quadriceps weakness after anterior cruciate ligament reconstruction: A systematic review and meta-analysis","volume":"30","author":"Tsai","year":"2022","journal-title":"Knee Surgery, Sports Traumatology, Arthroscopy"},{"issue":"24","key":"10.1016\/j.ptsp.2026.101924_bib37","doi-asserted-by":"crossref","first-page":"2405","DOI":"10.1080\/02640414.2016.1271138","article-title":"Increasing hip and knee flexion during a drop-jump task reduces tibiofemoral shear and compressive forces: Implications for ACL injury prevention training","volume":"35","author":"Tsai","year":"2017","journal-title":"Journal of Sports Sciences"},{"issue":"12","key":"10.1016\/j.ptsp.2026.101924_bib38","doi-asserted-by":"crossref","first-page":"2007","DOI":"10.1002\/jor.22176","article-title":"Greater muscle co\u2010contraction results in increased tibiofemoral compressive forces in females who have undergone anterior cruciate ligament reconstruction","volume":"30","author":"Tsai","year":"2012","journal-title":"Journal of Orthopaedic Research"},{"key":"10.1016\/j.ptsp.2026.101924_bib39","doi-asserted-by":"crossref","DOI":"10.1016\/j.jelekin.2023.102809","article-title":"Athletes with a history of ACL reconstruction exhibit greater inter-limb asymmetry in impact forces during the first landing of a drop vertical jump compared to the second landing","volume":"72","author":"VanZile","year":"2023","journal-title":"Journal of Electromyography and Kinesiology"},{"issue":"8","key":"10.1016\/j.ptsp.2026.101924_bib40","doi-asserted-by":"crossref","DOI":"10.1177\/23259671241258775","article-title":"Incidence of osteoarthritis between ACL reconstruction with different graft types and between ACL reconstruction and repair: A systematic review and meta-analysis of randomized controlled trials","volume":"12","author":"Vendrig","year":"2024","journal-title":"Orthopaedic Journal of Sports Medicine"},{"key":"10.1016\/j.ptsp.2026.101924_bib41","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1007\/s00167-003-0400-9","article-title":"Dynamic joint loading following hamstring and patellar tendon anterior cruciate ligament reconstruction","volume":"12","author":"Webster","year":"2004","journal-title":"Knee Surgery, Sports Traumatology, Arthroscopy"},{"issue":"4","key":"10.1016\/j.ptsp.2026.101924_bib42","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1016\/S0021-9290(01)00222-6","article-title":"ISB recommendation on definitions of joint coordinate system of various joints for the reporting of human joint motion\u2014part I: Ankle, hip, and spine","volume":"35","author":"Wu","year":"2002","journal-title":"Journal of Biomechanics"},{"issue":"3","key":"10.1016\/j.ptsp.2026.101924_bib43","first-page":"268","article-title":"Anatomic landmarks utilized for physeal-sparing, anatomic anterior cruciate ligament reconstruction: An MRI-based study","volume":"94","author":"Xerogeanes","year":"2012","journal-title":"The Journal of Bone & Joint Surgery"}],"container-title":["Physical Therapy in Sport"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1466853X26000453?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1466853X26000453?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T02:43:31Z","timestamp":1778813011000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S1466853X26000453"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5]]},"references-count":43,"alternative-id":["S1466853X26000453"],"URL":"https:\/\/doi.org\/10.1016\/j.ptsp.2026.101924","relation":{},"ISSN":["1466-853X"],"issn-type":[{"value":"1466-853X","type":"print"}],"subject":[],"published":{"date-parts":[[2026,5]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Limb underloading and reduced functional use of the knee during the squat is linked to reduced jumping performance in athletes six months after anterior cruciate ligament reconstruction","name":"articletitle","label":"Article Title"},{"value":"Physical Therapy in Sport","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ptsp.2026.101924","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.","name":"copyright","label":"Copyright"}],"article-number":"101924"}}