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Lower Extremity Muscle Activation Patterns During the Propulsion Phase of a Single Limb Hop Task in Patients Following ACL Reconstruction and Healthy Controls

Zink, Cody J
http://orcid.org/0000-0002-8262-2262
http://rave.ohiolink.edu/etdc/view?acc_num=toledo152546398384202

Abstract Details

2018, Master of Science, University of Toledo, Exercise Science.
Context: A large number of ACL reconstruction (ACL-R) patients are suffering from secondary ACL rupture following return to activity. ACL-R patients are also developing osteoarthritis at an accelerated rate, suggesting an altered movement strategy. The SLH is commonly used to assess functional performance following ACL-R. Objective: To identify patterns of lower extremity (LE) muscle activation during the propulsion phase of a single leg hop (SLH) for distance in ACL-R patients compared to healthy controls. Design: Cross-sectional Setting: Laboratory setting. Patients or Other Participants: Sixteen participants were included (8 ACL-R, 8 Healthy). ACL-R volunteers met the following criteria: unilateral, primary ACL-R, and have physician clearance. Control participants were excluded if they had a prior LE surgery, or any LE injuries within the last 6 months. Interventions: Subjective function was assessed using IKDC. Torque was measured using a HHD, and in the knee flexors and extensors using an isokinetic dynamometer. All volunteers performed 3 SLH for distance trials. Muscle activity of the gluteus maximus, semitendinosus, VMO, and the medial gastrocnemius was measured bilaterally with wireless EMG. EMG amplitudes were normalized to MVIC trials. Independent t-tests were be used to compare between the groups. Paired t-tests were used for between-limb comparisons. Independent-tests were used to compare limbs between the ACL-R group and control groups. Main Outcome Measures: Mean amplitude of the selected musculature during the propulsion phase of the single limb hop test. SLH distance leg symmetry index (LSI) between groups. Results: ACL-R group reported lower PRO scores than the healthy group on the IKDC (P=.024). The ACL-R limb had lower knee extensor torque compared to the control limb (P =.029). No differences in EMG amplitude or SLH LSI in any of the comparisons. Conclusions: The ACL reconstruction limb displayed weakness in the knee extensors, and lower PRO scores. Word Count: 298
Grant Norte, PhD, ATC (Committee Chair)
Neal Glaviano, PhD, ATC (Committee Member)
Amanda Murray, PhD, DPT, PT (Committee Member)
Lucinda Bouillon, PhD, PT (Committee Member)
86 p.
Kinesiology
ACL,ACL reconstruction Single leg hop, EMG, muscle activation, propulsion

Recommended Citations

Citations

  • Zink, C. J. (2018). Lower Extremity Muscle Activation Patterns During the Propulsion Phase of a Single Limb Hop Task in Patients Following ACL Reconstruction and Healthy Controls [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo152546398384202

    APA Style (7th edition)

  • Zink, Cody. Lower Extremity Muscle Activation Patterns During the Propulsion Phase of a Single Limb Hop Task in Patients Following ACL Reconstruction and Healthy Controls. 2018. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo152546398384202.

    MLA Style (8th edition)

  • Zink, Cody. "Lower Extremity Muscle Activation Patterns During the Propulsion Phase of a Single Limb Hop Task in Patients Following ACL Reconstruction and Healthy Controls." Master's thesis, University of Toledo, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo152546398384202

    Chicago Manual of Style (17th edition)

toledo152546398384202
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© 2018, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.