Journal article
Biomechanical response to ankle-foot orthosis stiffness during running
Clinical biomechanics (Bristol), Vol.30(10), pp.1125-1132
12/2015
DOI: 10.1016/j.clinbiomech.2015.08.014
PMID: 26371854
Abstract
The Intrepid Dynamic Exoskeletal Orthosis (IDEO) is an ankle-foot orthosis developed to address the high rates of delayed amputation in the military. Its use has enabled many wounded Service Members to run again. During running, stiffness is thought to influence an orthosis' energy storage and return mechanical properties. This study examined the effect of orthosis stiffness on running biomechanics in patients with lower limb impairments who had undergone unilateral limb salvage.
Ten patients with lower limb impairments underwent gait analysis at a self-selected running velocity. 1. Nominal (clinically-prescribed), 2. Stiff (20% stiffer than nominal), and 3. Compliant (20% less stiff than nominal) ankle-foot orthosis stiffnesses were tested.
Ankle joint stiffness was greatest in the stiffest strut and lowest in the compliant strut, however ankle mechanical work remained unchanged. Speed, stride length, cycle time, joint angles, moments, powers, and ground reaction forces were not significantly different among stiffness conditions. Ankle joint kinematics and ankle, knee and hip kinetics were different between limbs. Ankle power, in particular, was lower in the injured limb.
Ankle-foot orthosis stiffness affected ankle joint stiffness but did not influence other biomechanical parameters of running in individuals with unilateral limb salvage. Foot strike asymmetries may have influenced the kinetics of running. Therefore, a range of stiffness may be clinically appropriate when prescribing ankle-foot orthoses for active individuals with limb salvage.
Details
- Title: Subtitle
- Biomechanical response to ankle-foot orthosis stiffness during running
- Creators
- Elizabeth 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.comHarmony S Choi - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United StatesJohnny G Owens - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United StatesRyan V Blanck - Center for the Intrepid, Department of Orthopaedics and Rehabilitation, Brooke Army Medical Center, Ft. Sam Houston, TX 78234, United StatesJason 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
- Clinical biomechanics (Bristol), Vol.30(10), pp.1125-1132
- Publisher
- England
- DOI
- 10.1016/j.clinbiomech.2015.08.014
- PMID
- 26371854
- ISSN
- 0268-0033
- eISSN
- 1879-1271
- Grant note
- name: Center for Rehabilitation Sciences Research (CRSR), Department of Physical Medicine and Rehabilitation, Uniformed Services University of Health Sciences, Bethesda, MD
- Language
- English
- Date published
- 12/2015
- Academic Unit
- Physical Therapy and Rehabilitation Science
- Record Identifier
- 9984047776602771
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