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Angle-specific torque profiles of concentric and eccentric thigh muscle strength 20 years after anterior cruciate ligament injury
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0001-5859-4284
Umeå University, Faculty of Social Sciences, Umeå School of Business and Economics (USBE), Statistics.ORCID iD: 0000-0001-7917-5687
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0002-0366-4609
2022 (English)In: Sports Biomechanics, ISSN 1476-3141, E-ISSN 1752-6116Article in journal (Refereed) Epub ahead of print
Abstract [en]

Thigh muscle weakness prevails following anterior cruciate ligament (ACL) injury, as usually evaluated by peak concentric quadriceps strength. Assessment throughout the range of motion (ROM), and for antagonists may provide more comprehensive information. We evaluated angle-specific torque profiles and ratios of isokinetic thigh muscle strength in 70 individuals 23 ± 2 years post-ACL injury (44males, 46.9 ± 5.4 years); 33 treated with ACL-reconstruction (ACL-R), and 37 treated only with physiotherapy (ACL-PT), and 33 controls. Quadriceps and hamstrings torques for concentric/eccentric contractions (90°/s) and ratios between hamstrings/quadriceps strength (HQ) were compared between and within groups using inferential functional data methods. The injured ACL-R leg had lower concentric and eccentric quadriceps strength compared to non-injured leg throughout the ROM, and lower concentric (interval 70–79°) and eccentric (64–67°) quadriceps strength compared to controls. The injured ACL-PT leg showed lower eccentric quadriceps strength (53–77°) than non-injured leg and lower concentric (41–79°) and eccentric (52–81°) quadriceps and eccentric hamstrings (30–77°) strength than controls. There were no group differences for HQ-ratios. The injured ACL-R leg had higher HQ-ratio (34–37°) than non-injured leg. Angle-specific torque profiles revealed strength deficits, masked if using only peak values, and seem valuable for ACL-injury rehabilitation.     

Place, publisher, year, edition, pages
Routledge, 2022.
Keywords [en]
Long-term perspective, isokinetic, functional data analysis, rehabilitation, strength assessment, cross-sectional study
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-194432DOI: 10.1080/14763141.2022.2054856ISI: 000777927100001PubMedID: 35373714Scopus ID: 2-s2.0-85129195440OAI: oai:DiVA.org:umu-194432DiVA, id: diva2:1656183
Part of project
Knee Function after ACL Injury - genetic predisposition, clinical and laboratory assessment and long term consequences in relation to treatment, development of ostheoarthritis and quality of life., Swedish Research Council
Funder
Swedish Research Council, K2014-99X21876-04-4Swedish Research Council, 2017-00892Swedish Research Council, 2016-02763Swedish National Centre for Research in Sports, CIF 2017/8Swedish National Centre for Research in Sports, P2018-0104Region Västerbotten, RV-838421Konung Gustaf V:s och Drottning Victorias FrimurarestiftelseAvailable from: 2022-05-04 Created: 2022-05-04 Last updated: 2023-03-24

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Tengman, EvaSchelin, LinaHäger, Charlotte

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