William Brett Johnson, PhD; Stefania Fatone, PhD, BPO(Hons); Steven A. Gard, PhD
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Transcript of William Brett Johnson, PhD; Stefania Fatone, PhD, BPO(Hons); Steven A. Gard, PhD
This article and any supplementary material should be cited as follows: Johnson WB, Fatone S, Gard SA. Modeling effects of sagittal-plane hip joint stiffness on reciprocating gait orthosis-assisted gait. J Rehabil Res Dev. 2013;50(10):1449–56. http://dx.doi.org/10.1682/JRRD.2013.01.0013
Slideshow ProjectDOI:10.1682/JRRD.2013.01.0013JSP
Modeling effects of sagittal-plane hip joint stiffness on reciprocating
gait orthosis-assisted gait
William Brett Johnson, PhD; Stefania Fatone, PhD, BPO(Hons); Steven A. Gard, PhD
This article and any supplementary material should be cited as follows: Johnson WB, Fatone S, Gard SA. Modeling effects of sagittal-plane hip joint stiffness on reciprocating gait orthosis-assisted gait. J Rehabil Res Dev. 2013;50(10):1449–56. http://dx.doi.org/10.1682/JRRD.2013.01.0013
Slideshow ProjectDOI:10.1682/JRRD.2013.01.0013JSP
• Aim– Determine effects of increased hip joint stiffness on gait of
nondisabled persons using lower-limb paralysis simulator (LLPS).• LLPS enabled nondisabled persons to exhibit characteristics of
reciprocating gait orthosis (RGO)-assisted gait
• Relevance– Upright ambulation may improve quality of life for persons
with lower-limb paralysis. • However, walking with RGO can be slow and exhausting.• Increased RGO hip joint stiffness may improve gait efficiency.
This article and any supplementary material should be cited as follows: Johnson WB, Fatone S, Gard SA. Modeling effects of sagittal-plane hip joint stiffness on reciprocating gait orthosis-assisted gait. J Rehabil Res Dev. 2013;50(10):1449–56. http://dx.doi.org/10.1682/JRRD.2013.01.0013
Slideshow ProjectDOI:10.1682/JRRD.2013.01.0013JSP
Method• While nondisabled
subjects walked with LLPS at four different hip joint stiffness settings, we measured:– Hip flexion.– Crutch ground reaction
forces (GRFs).– Oxygen consumption.
LLPS.
This article and any supplementary material should be cited as follows: Johnson WB, Fatone S, Gard SA. Modeling effects of sagittal-plane hip joint stiffness on reciprocating gait orthosis-assisted gait. J Rehabil Res Dev. 2013;50(10):1449–56. http://dx.doi.org/10.1682/JRRD.2013.01.0013
Slideshow ProjectDOI:10.1682/JRRD.2013.01.0013JSP
Results• Walking speed was observed to initially increase
with increases in hip joint stiffness, and then decrease.
• Oxygen cost was observed to initially decrease with increases in hip joint stiffness, and then decrease.
This article and any supplementary material should be cited as follows: Johnson WB, Fatone S, Gard SA. Modeling effects of sagittal-plane hip joint stiffness on reciprocating gait orthosis-assisted gait. J Rehabil Res Dev. 2013;50(10):1449–56. http://dx.doi.org/10.1682/JRRD.2013.01.0013
Slideshow ProjectDOI:10.1682/JRRD.2013.01.0013JSP
Conclusion
• Findings suggest that increasing hip joint stiffness may increase walking speed for RGO users.