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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.

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Presentation on theme: "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."— Presentation transcript:

1 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 Project DOI: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

2 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 Project DOI: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.

3 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 Project DOI: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.

4 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 Project DOI: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.

5 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 Project DOI:10.1682/JRRD.2013.01.0013JSP Conclusion Findings suggest that increasing hip joint stiffness may increase walking speed for RGO users.

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