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A novel test reliably captures hip and knee kinematics and kinetics during unanticipated/anticipated diagonal hops in individuals with anterior cruciate ligament reconstruction
Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Avdelningen för fysioterapi.ORCID-id: 0000-0002-6339-9544
Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Avdelningen för fysioterapi.ORCID-id: 0000-0002-0366-4609
2019 (Engelska)Ingår i: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

Unanticipated land-and-cut maneuvers might emulate lower limb mechanics associated with anterior cruciate ligament (ACL) injury. Reliability studies on landing mechanics of such maneuvers are however lacking. This study investigated feasibility and within-session reliability of landing mechanics of a novel one-leg double-hop test, mimicking a land-and-cut maneuver, in individuals with ACL reconstruction (ACLR). Our test comprised a forward hop followed by a diagonal hop in either of two directions (medial/lateral) under anticipated and unanticipated conditions. Twenty individuals with a unilateral ACLR (aged 24.2 ± 4.2 years, 0.7-10.8 years post-surgery) performed three successful hops/direction per leg. We determined reliability (intraclass correlation coefficient [ICC]) and agreement (standard error of measurement [SEM]) of 3-dimensional hip and knee angles and moments during the deceleration phase of the land-and-cut maneuver (vulnerable for non-contact ACL injuries). Mean success rate for unanticipated hops was 71-77% and for anticipated hops 91-95%. Both limbs demonstrated moderate-excellent reliability (ICC 95% confidence intervals: 0.50-0.99) for almost all hip and knee peak angles and moments in all planes and conditions, with a few exceptions: poor-good reliability for hip and knee frontal and/or transverse plane variables, especially for lateral diagonal hops. The SEMs were ≤5° and ≤0.23 N·m/kg·m for most peak angles and moments, respectively. Our test seems feasible and showed satisfactory reliability for most hip and knee angles and moments; however, low knee abduction and internal rotation angles and moments, and moderate reliability of these moments deserve consideration. The test appears to challenge dynamic knee control and may prove valuable in evaluation during knee rehabilitation.

Ort, förlag, år, upplaga, sidor
2019.
Nyckelord [en]
Biomechanics, Feasibility, Injury, Kinematics, Kinetics, Sport
Nationell ämneskategori
Sjukgymnastik
Forskningsämne
biomekanik
Identifikatorer
URN: urn:nbn:se:umu:diva-165259DOI: 10.1016/j.jbiomech.2019.109480PubMedID: 31727373OAI: oai:DiVA.org:umu-165259DiVA, id: diva2:1370830
Tillgänglig från: 2019-11-18 Skapad: 2019-11-18 Senast uppdaterad: 2019-11-19

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Arumugam, AshokanMarkström, JonasHäger, Charlotte

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