You are here

  • Home
  • Archive
  • Volume 5, Issue 1
  • Knee strength, hop performance and self-efficacy at 4 months are associated with symmetrical knee muscle function in young athletes 1 year after an anterior cruciate ligament reconstruction

Article Text

Article menu

Download PDFPDF

XML
Original article
Knee strength, hop performance and self-efficacy at 4 months are associated with symmetrical knee muscle function in young athletes 1 year after an anterior cruciate ligament reconstruction
  1. Susanne Beischer1,2,
  2. Eric Hamrin Senorski1,2,
  3. Christoffer Thomeé1,
  4. Kristian Samuelsson3,4,
  5. Roland Thomeé1,2
  1. 1 Sportrehab Sports Medicine Clinic, Gothenburg, Sweden
  2. 2 Section of Physiotherapy, Department of Health and Rehabilitation, Institute of Neuroscience and Physiology, Gothenburg, Sweden
  3. 3 Department of Orthopaedics, Institute of Clinical Sciences, Gothenburg, Sweden
  4. 4 Department of Orthopaedics, Sahlgrenska University Hospital, Mölndal, Sweden
  1. Correspondence to Susanne Beischer; susanne.beischer{at}gu.se

Abstract

Objectives We investigated whether patient demographics, 4-month patient-reported outcomes (PRO) and muscle function predicted young athletes regaining symmetrical muscle function in five tests of muscle function 1 year after ACL reconstruction.

Methods We extracted data on patient demographics, PROs and the results of five tests of muscle function from a rehabilitation-specific register. Athletes were 15–30 years of age, involved in knee-strenuous sport and had undergone a primary ACL reconstruction. The primary outcome was achieving a Limb Symmetry Index of ≥90% for the battery of tests 1 year after ACL reconstruction. Patient demographics, muscle-function data and results for PROs at the 4-month follow-up were analysed.

Results In all, 237 athletes (59% female; mean age 22±4 years) were included in the study. One year after ACL reconstruction, 26% (62/237) of the included athletes had achieved symmetrical muscle function. Univariable analysis showed that symmetrical muscle function was associated with present self-efficacy, OR 1.28 (95% CI 1.04 to 1.58, p=0.011), knee-extension strength, OR 1.73 (95% CI 1.28 to 2.34), knee-flexion strength, OR 1.39 (95% CI 1.07 to 1.81), vertical hop, OR 1.77 (95% CI 1.27 to 2.45), single-leg hop for distance, OR 1.98 (95% CI 1.24 to 3.17) and side hop, OR 1.64 (95% CI 1.15 to 2.33).

Conclusion Symmetrical knee-extension and knee-flexion strength, a more symmetrical hop performance and higher present self-efficacy at an early stage all increased the odds of achieving symmetrical muscle function in young athletes 1 year after ACL reconstruction.

  • adolescent
  • anterior cruciate ligament (ACL)
  • knee function
  • Limb Symmetry Index
  • recovery of function
  • rehabilitation sports
  • register
  • young adult

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

https://doi.org/10.1136/bmjsem-2018-000504

Statistics from Altmetric.com

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

    View Full Text

    Footnotes

    • Contributors All authors contributed to project planning. SB drafted the manuscript. All authors critically revised and approved the final version of the manuscript. All authors are responsible for the overall content as guarantors.

    • Funding The study was funded by grants from the Swedish Research Council for Sport Science, the Local Research and Development Board for Gothenburg and Södra Bohuslän, and by the Unit of Physiotherapy, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg.

    • Competing interests None declared.

    • Patient consent for publication Obtained.

    • Ethics approval The study was approved by the Regional Ethical Review Board in Gothenburg (registration numbers: 265-13, T023-17).

    • Provenance and peer review Not commissioned; externally peer reviewed.

    • Data sharing statement Analyses and additional data are available upon request to SB (susanne.beischer@gu.se).