Author ORCID Identifier
Myers - https://orcid.org/0000-0002-2934-2624
Pipinos - https://orcid.org/0000-0001-6873-6346
Document Type
Article
Publication Date
9-9-2012
Abstract
Background
Walking is problematic for patients with peripheral arterial disease. The purpose of this study was to investigate the frequency domain of the ground reaction forces during walking to further elucidate the ambulatory impairment of these patients.
Methods
Nineteen bilateral peripheral arterial disease patients and nineteen controls were included in this study. Subjects were matched for age and gait speed. Participants walked over a force plate sampling at 600 Hz. PAD patients were tested before (pain-free condition) after the onset of claudication symptoms (pain). We calculated median frequency, frequency bandwidth, and frequency containing 99.5% of the signal for the vertical and anterior–posterior ground reaction forces.
Findings
Our results showed reduced median frequency in the vertical and anterior–posterior components of the ground reaction forces between the control group and both peripheral arterial disease conditions. We found reduced frequency bandwidth in the anterior–posterior direction between controls and the peripheral arterial disease pain-free condition. There were no differences in median frequency or bandwidth between peripheral arterial disease pain-free and pain conditions, but an increase in the frequency content for 99.5% of the signal was observed in the pain condition.
Interpretation
Reduced frequency phenomena during gait in peripheral arterial disease patients compared to velocity-matched controls suggests more sluggish activity within the neuromotor system. Increased frequency phenomena due to pain in these patients suggest a more erratic application of propulsive forces when walking. Frequency domain analysis thus offers new insights into the gait impairments associated with this patient population.
Journal Title
Clinical Biomechanics
Volume
27
Issue
10
First Page
1058
Last Page
1063
Recommended Citation
McGrath, D, Judkins, TN, Pipinos, II, Johanning, JM, Myers, SA. (2012, Dec). Peripheral arterial disease affects the frequency response of ground reaction forces during walking. Clin Biomech.:27(10):1058-63. https://doi.org/10.1016/j.clinbiomech.2012.08.004
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
This is an Accepted Manuscript of an article published by Elsevier in Clinical Biomechanics on [September 9, 2012], available online: https://doi.org/10.1016/j.clinbiomech.2012.08.004