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Frymier_Thesis_5.1.19.pdf (2.79 MB)

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Influence of Trunk Position on Quadriceps and Gluteal Activation in Runners

Frymier, Allison
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556808141278218

Abstract Details

2019, Master of Science, University of Toledo, Exercise Science.
Context: The incidence of lower extremity injuries in runners stretches as high as 79.3%. Weakness or insufficient coordination of the quadriceps and gluteals can lead to overuse, strain, and compensatory movement patterns such as trunk flexion. The trunk accounts for roughly 50% of a person’s mass, so changes in orientation can alter the mechanical demands that are places on the lower extremity. Additional trunk flexion is thought to increase the action of the hip extensors. There is a lack of evidence that isolates quadriceps and gluteal muscle activation during flexion-based running. Objective: To determine the effects of trunk flexion on quadriceps, gluteal, hamstring, and erector spinae (ES) EMG measures in a healthy running population. Design: Descriptive laboratory. Setting: Laboratory. Participants: 18 total participants (10 females, 8 male). Inclusion: recreational runner aged 18-39 who ran an average of 15 miles per week. Exclusion: current lower extremity or low back pathology or one that has caused pain within 6 months of the study. Intervention: The independent variable was the position of the trunk (preferred, flexed, and extended). All participants completed five successful running trials for each trunk position. Main Outcome Measures: EMG measures and 3D trunk and lower extremity kinematics and kinetics were analyzed across the stance phase of the running trials. Results: The activation of the quadriceps and hamstrings exhibited no significance across the conditions. The activation of the gluteals exhibited a significant difference between the flexed and extended position (45.06 ± 13.36% vs. 30.72 ± 12.47%). The activation of the ES exhibited a significant difference between the preferred and extended position (20.50 ± 10.66% vs. 34.78 ± 14.86%). There were no differences detected in knee or hip sagittal plane posture. Conclusion: Sagittal plane trunk positioning has an influence on the activation of the gluteals and ES during free running.
Neal Glaviano (Committee Chair)
Amanda Murray (Committee Member)
Lucinda Bouillon (Committee Member)
Grant Norte (Committee Member)
74 p.
Kinesiology
Electromyography, Gait, Kinematics

Recommended Citations

Citations

  • Frymier, A. (2019). Influence of Trunk Position on Quadriceps and Gluteal Activation in Runners [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556808141278218

    APA Style (7th edition)

  • Frymier, Allison. Influence of Trunk Position on Quadriceps and Gluteal Activation in Runners. 2019. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556808141278218.

    MLA Style (8th edition)

  • Frymier, Allison. "Influence of Trunk Position on Quadriceps and Gluteal Activation in Runners." Master's thesis, University of Toledo, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556808141278218

    Chicago Manual of Style (17th edition)

toledo1556808141278218
291
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This open access ETD is published by University of Toledo and OhioLINK.