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Effects of Chronic Ankle Instability and Ankle Bracing on Plantar Pressure during a Jump Landing Task

Rix, Jessica
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1305124623

Abstract Details

2011, Master of Science in Exercise Science, University of Toledo, College of Health Sciences.
Objective: The purpose of this study was to investigate the differences in plantar pressure distribution between individuals with and without chronic ankle instability. A secondary purpose was to explore the potential changes in pressure during a dynamic task while wearing a prophylactic ankle brace. Design and Setting: The mean peak plantar pressures over three regions and total foot for the braced and non-braced trials was used for statistical analysis. From these regions and the total foot, four dependent variables for medial/lateral pressure ratios were calculated. For each dependent variable, a two-way ANOVA was performed with one between (CAI and control) and one within (braced and non-braced) independent variables. Significance was set at p<0.05. Subjects: Ten healthy (6 male, 4 female; 22.2+/-2.16 yrs; 69.9+/-3.37in; 179.9+/-21.57) individuals, and ten CAI (6 male, 4 female; 21.2+/-1.72 yrs; 68.6+/-3.60in; 167+/-23.93lbs) individuals participated in the study. Measurements: Each subject reported to the lab one time for testing. For the non-braced trial the subject was asked to perform 3 vertical jumps at 50% of vertical jump maximum with a single-leg jump landing. To perform the jump-landing task, the subjects started with both feet together 70 cm from the center of the force plate. They performed a two-footed take off jump, reaching for their 50% Max vertical jump height on the Vertec, and then landed on the single testing limb on the force plate, attempting to stabilize as fast as they could with hands on hips. The subject removed the shoe on the testing limb and the Swede-O Universal Lace Up Brace was applied by the same certified Athletic Trainer. Data collecting procedure followed the same protocol as the above described for the non-braced trial. Results: For the medial-lateral midfoot and rearfoot ratios there was statistical significance(p=.041 and .001) when comparing the braced and non-braced trials. For the total foot ratio there was also statistical significance (p=.02) for the braces versus non braced trials. Conclusion: The evidence from this study suggests that ankle braces causes an increase in lateral foot pressure, which may be due to the rigid nature of the brace keeping the foot in a more neutral position during landing. This may be important to understanding how a brace application may be beneficial to preventing additional ankle injury. To our knowledge, this research is the first step in utilizing the F-scan plantar pressure system to analyze plantar pressure during a jump landing. Future research should be done utilizing larger sample sizes as well as variations of ankle braces.
Phillip Gribble, PhD (Committee Chair)
Charles Armstrong, PhD (Committee Member)
Brian Pietrosimone, PhD (Committee Member)
Biomechanics
plantar pressure distribution; ankle braces

Recommended Citations

Citations

  • Rix, J. (2011). Effects of Chronic Ankle Instability and Ankle Bracing on Plantar Pressure during a Jump Landing Task [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1305124623

    APA Style (7th edition)

  • Rix, Jessica. Effects of Chronic Ankle Instability and Ankle Bracing on Plantar Pressure during a Jump Landing Task. 2011. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1305124623.

    MLA Style (8th edition)

  • Rix, Jessica. "Effects of Chronic Ankle Instability and Ankle Bracing on Plantar Pressure during a Jump Landing Task." Master's thesis, University of Toledo, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1305124623

    Chicago Manual of Style (17th edition)

toledo1305124623
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© 2011, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.