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Variability in leg muscle power and hop performance after anterior cruciate ligament reconstruction
Sahlgrenska University Hospital ; Gothenburg University.
Sahlgrenska University Hospital ; Gothenburg University.
Sahlgrenska University Hospital ; Gothenburg University.
Sahlgrenska University Hospital ; Gothenburg University.
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2012 (English)In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347, Vol. 20, no 6, p. 1143-1151Article in journal (Refereed) Published
Abstract [en]

Purpose The purpose of this prospective study was to describe the variability in leg muscle power and hop performance up to 2 years among patients following ACL reconstruction and specifically to illustrate the effects of various criteria for an acceptable level of muscle function.

Methods Eighty-two patients (56 men and 26 women) with a mean age of 28 years, who underwent ACL reconstruction using either hamstring tendons (n = 46) or apatellar tendon (n = 36), were assessed pre-operatively and 3, 6, 12 and 24 months post-surgery with a battery of three lower extremity muscle power tests and a battery of three hop tests. Results Leg symmetry index (LSI) values at group level ranged between 73 and 100% at all follow-ups. When the tests were evaluated individually, patients reached an average LSI of C90% at 24 months. The success rate at 24 months for the muscle power test battery, that is, patients with an LSI of C90% in all three tests, was 48 and 44% for the hop test battery. The success rate at 24 months for both test batteries on all six muscle function tests was 22%. The criterion of an LSI of C80% resulted in 53% of the patients having an acceptable level on all six tests, while with a criterion of an LSI of C100%, none of the patients reached an acceptable level.

Conclusion At group level and in single muscle function tests, the muscle function outcome 1 and 2 years after ACL reconstruction is satisfactory in the present study and on a par with the results presented in the literature. However, when using more demanding criteria for a successful muscle function outcome, using batteries of tests or increasing the acceptable LSI level from C90% to C95% or C100%, the results are considered to be poor. It is suggested that this should be taken into consideration when presenting results after ACL rehabilitation, deciding on the criteria for a safe return to sports, or designing rehabilitation programmes after ACL reconstruction.

Level of evidence Prognostic prospective cohort study, Level I.

Place, publisher, year, edition, pages
2012. Vol. 20, no 6, p. 1143-1151
National Category
Sport and Fitness Sciences
Research subject
Natural Science, Medicine; Social Sciences, Sport Science
Identifiers
URN: urn:nbn:se:lnu:diva-51281DOI: 10.1007/s00167-012-1912-yOAI: oai:DiVA.org:lnu-51281DiVA, id: diva2:913958
Available from: 2016-03-23 Created: 2016-03-23 Last updated: 2017-11-30Bibliographically approved

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Augustsson, Jesper

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