Journal article
Biomechanics of uphill walking using custom ankle-foot orthoses of three different stiffnesses
Gait & posture, Vol.41(3), pp.750-756
03/2015
DOI: 10.1016/j.gaitpost.2015.01.001
PMID: 25743775
Abstract
Ankle-foot orthoses (AFOs) can provide support and improve walking ability in individuals with plantarflexor weakness. Passive-dynamic AFO stiffness can be optimized for over-ground walking, however little research exists for uphill walking, when plantarflexor contributions are key.
Compare uphill walking biomechanics (1) between dynamic AFO users and able-bodied control subjects. (2) between injured and sound limbs (3) across different AFO stiffnesses.
Twelve patients with unilateral limb-salvage and twelve matched, able-bodied controls underwent biomechanical gait analysis when walking up a 10° incline. Three AFO stiffnesses were tested in the patient group: Nominal (clinically prescribed), Compliant (20% less stiff), and Stiff (20% more stiff).
AFO users experienced less ankle motion and power generation, lower knee extensor moments, and greater hip flexion and power generation than controls during uphill walking. Despite these deviations, they walked at equivalent self-selected velocities and stride lengths. Asymmetries were present at the ankle and knee with decreased ankle motion and power, and lower knee extensor moments on the AFO limb. Stiffer AFOs increased knee joint flexion but a 40% range in AFO stiffness had few other effects on gait. Therefore, a wide range of clinically prescribed AFO stiffnesses may adequately assist uphill walking.
Details
- Title: Subtitle
- Biomechanics of uphill walking using custom ankle-foot orthoses of three different stiffnesses
- Creators
- Derek J Haight - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United StatesElizabeth Russell Esposito - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United States. Electronic address: erussell.kin@gmail.comJason M Wilken - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United States
- Resource Type
- Journal article
- Publication Details
- Gait & posture, Vol.41(3), pp.750-756
- Publisher
- England
- DOI
- 10.1016/j.gaitpost.2015.01.001
- PMID
- 25743775
- ISSN
- 0966-6362
- eISSN
- 1879-2219
- Language
- English
- Date published
- 03/2015
- Academic Unit
- Physical Therapy and Rehabilitation Science
- Record Identifier
- 9984047656402771
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