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Thigh muscle co-contraction patterns in individuals with anterior cruciate ligament reconstruction, athletes and controls during a novel double-hop test
Department of Physiotherapy, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy. (U-motion Laboratory)ORCID iD: 0000-0002-0366-4609
2022 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 12, article id 8431Article in journal (Refereed) Published
Abstract [en]

Efficient neuromuscular coordination of the thigh muscles is crucial in maintaining dynamic knee stability and thus reducing anterior cruciate ligament (ACL) injury/re-injury risk. This cross-sectional study measured electromyographic (EMG) thigh muscle co-contraction patterns during a novel one-leg double-hop test among individuals with ACL reconstruction (ACLR; n = 34), elite athletes (n = 22) and controls (n = 24). Participants performed a forward hop followed by a 45° unanticipated diagonal hop either in a medial (UMDH) or lateral direction (ULDH). Medial and lateral quadriceps and hamstrings EMG were recorded for one leg (injured/non-dominant). Quadriceps-to-Hamstring (Q:H) ratio, lateral and medial Q:H co-contraction indices (CCIs), and medial-to-lateral Q:H co-contraction ratio (CCR; a ratio of CCIs) were calculated for three phases (100 ms prior to landing, initial contact [IC] and deceleration phases) of landing. We found greater activity of the quadriceps than the hamstrings during the IC and deceleration phases of UMDH/ULDH across groups. However, higher co-contraction of medial rather than lateral thigh muscles during the deceleration phase of landing was found; if such co-contraction patterns cause knee adduction, a putative mechanism to decrease ACL injury risk, during the deceleration phase of landing across groups warrants further investigation.

Place, publisher, year, edition, pages
Nature Publishing Group, 2022. Vol. 12, article id 8431
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-194426DOI: 10.1038/s41598-022-12436-6ISI: 000798064600069PubMedID: 35589937Scopus ID: 2-s2.0-85130412384OAI: oai:DiVA.org:umu-194426DiVA, id: diva2:1656180
Funder
Swedish Research Council, 2017-00892Region Västerbotten, ALF VLL548501Region Västerbotten, VLL838421Region Västerbotten, VLL-358901Swedish National Centre for Research in Sports, CIF 2020/3/P2020-0061Konung Gustaf V:s och Drottning Victorias FrimurarestiftelseAvailable from: 2022-05-04 Created: 2022-05-04 Last updated: 2022-12-29Bibliographically approved

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Arumugam, AshokanHäger, Charlotte

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