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dc.contributor.authorRocchi, J.E.
dc.contributor.authorLabanca, L.
dc.contributor.authorLaudani, Luca
dc.contributor.authorMinganti, C.
dc.contributor.authorMariani, P.P.
dc.contributor.authorMacaluso, A.
dc.date.accessioned2019-01-08T10:29:38Z
dc.date.available2019-01-08T10:29:38Z
dc.date.issued2018-10-29
dc.identifier.citationRocchi, J.E., Labanca, L., Laudani, L., Minganti, C., Mariani, P.P. and Macaluso, A. (2018) 'Timing of Muscle Activation Is Altered During Single-Leg Landing Tasks After Anterior Cruciate Ligament Reconstruction at the Time of Return to Sport', Clinical Journal of Sport Medicine: official journal of the Canadian Academy of Sport Medicine. https://doi.org/10.1097/JSM.0000000000000659en_US
dc.identifier.issn1050-642X
dc.identifier.issn1536-3724 (online)
dc.identifier.urihttp://hdl.handle.net/10369/10202
dc.descriptionArticle published in Clinical Journal of Sport Medicine, available at https://doi.org/10.1097/JSM.0000000000000659en_US
dc.description.abstractOBJECTIVES:It is well known that alterations in landing mechanics persist for years after anterior cruciate ligament reconstruction (ACL-R). Nevertheless, existing literature is controversial in reporting successful or unsuccessful recovery of prelanding muscle activation timing after ACL-R. The study aimed at comparing myoelectric and kinematic patterns during landing tasks between ACL-R and healthy subjects. DESIGN:Cross-sectional study. SETTING:Institutional research laboratory. PATIENTS AND INTERVENTION:Fifteen male athletes after ACL-R using patellar tendon and 11 using hamstrings autograft at the time of return to sport were recruited. Fifteen healthy athletes served as control group. Participants performed 4 different single-leg landing tasks arriving onto a force plate. MAIN OUTCOME MEASURES:Electromyographic (EMG) activity of knee extensors and flexors, normalized vertical ground reaction force (vGRF), and knee angular displacement were recorded. RESULTS:In all the tasks, preimpact EMG duration was longer in ACL-R (112 ± 28 ms in the knee extensors; 200 ± 34 ms in the knee flexors) compared with healthy participants (74 ± 19 ms in the knee extensors; 153 ± 29 ms in the knee flexors; P < 0.05). Initial contact (IC) and maximum postimpact knee angle were lower in ACL-R (9 ± 7 degrees at IC; 39 ± 12 degrees at maximum flexion) compared with healthy participants (17 ± 9 degrees at IC; 52 ± 15 degrees at maximum flexion; P < 0.05). Normalized vGRF was higher in ACL-R compared with healthy participants (3.4 ± 0.5 and 2.7 ± 0.6; P < 0.05). CONCLUSIONS:At the time of return to sport, ACL-R subjects showed altered motor control strategies of single-leg landings. These alterations may lead to uncoordinated movement, hence increasing the risk of reinjury.en_US
dc.language.isoenen_US
dc.publisherLippincott, Williams & Wilkinsen_US
dc.titleTiming of Muscle Activation Is Altered During Single-Leg Landing Tasks After Anterior Cruciate Ligament Reconstruction at the Time of Return to Sporten_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1097/JSM.0000000000000659
dcterms.dateAccepted2018-08-06
rioxxterms.funderCardiff Metropolitan Universityen_US
rioxxterms.identifier.projectCardiff Metropolian (Internal)en_US
rioxxterms.versionAMen_US
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_US
rioxxterms.licenseref.startdate2019-10-29
rioxxterms.freetoread.startdate2019-10-29
rioxxterms.funder.project37baf166-7129-4cd4-b6a1-507454d1372een_US


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