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ACL reconstruction with a hamstring graft, can a forced foot dorsiflexion alter isokinetic knee flexion performance - a pilot study
Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
2019 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Abstract

Introduction: The prevalence of anterior cruciate ligament tear is around 7000 every year within the swedish population and 95% of reconstructive surgery was with a hamstring tendon graft. Six months post surgery a 13% decrease in knee flexion strength compared to non injured side. The need for a study that determine the role of gastrocnemius and foot position in knee flexion is lacking in the litterature and could benefit Physiotheraphy ACL rehabilitation. Purpose: of his study was to investigate M gastrocnemius medialis (MGM) activation in the ipsilateral knee after removal of hamstring tendon for ACLR, and se if ankle position alter knee flexion outcomes. Method: 3 women, mean age 24 years who underwent ACL reconstruction with hamstring graft on one leg was tested. The time since injury was 3, 6 and 7 years respectively with an mean ,5 years wait until surgery. Isokinetic knee flexion and extension testing was done in the Biodex system 3 pro. EMG electrodes measured medial gastrocnemius activation with and without ankle in dorsiflexion. Results: Knee flexion peak strength was higher by a mean of 3 Nm (3,5%) with dorsiflexed foot. Mean (MGM) activation remained the same with or without dorsiflexion. Overall knee flexion strength was higher by a mean of 5 Nm compared to the injured side. Conclusion: Knee flexion in the biodex with foot in dorsiflexion could allow for isometric plantarflexion and increas power output. Certain changes in inclusion criteria and methodology as well more studies is needed to come to a given conclusion.

Place, publisher, year, edition, pages
2019. , p. 17
Keywords [en]
Biodex, EMG, Gastrocnemius, Knee flexion, Muscle activation
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:ltu:diva-74642OAI: oai:DiVA.org:ltu-74642DiVA, id: diva2:1326036
Subject / course
Student thesis, at least 15 credits
Educational program
Physiotherapy, bachelor's level
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nejAvailable from: 2019-06-20 Created: 2019-06-17 Last updated: 2019-06-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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