Powered hip exoskeleton improves walking economy in individuals with above-knee amputation
Above-knee amputation severely reduces the mobility and quality of life of millions of individuals. Walking with available leg prostheses is highly inefficient, and poor walking economy is a major problem limiting mobility. Here we show that an autonomous powered hip exoskeleton assisting the residu...
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Veröffentlicht in: | Nature medicine 2021-10, Vol.27 (10), p.1783-1788 |
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description | Above-knee amputation severely reduces the mobility and quality of life of millions of individuals. Walking with available leg prostheses is highly inefficient, and poor walking economy is a major problem limiting mobility. Here we show that an autonomous powered hip exoskeleton assisting the residual limb significantly improves metabolic walking economy by 15.6 ± 2.9% (mean ± s.e.m.; two-tailed paired
t
-test,
P
= 0.002) in six individuals with above-knee amputation walking on a treadmill. The observed metabolic cost improvement is equivalent to removing a 12-kg backpack from a nonamputee individual. All participants were able to walk overground with the exoskeleton, including starting and stopping, without notable changes in gait balance or stability. This study shows that assistance of the user’s residual limb with a powered hip exoskeleton is a viable solution for improving amputee walking economy. By significantly reducing the metabolic cost of walking, the proposed hip exoskeleton may have a considerable positive impact on mobility, improving the quality of life of individuals with above-knee amputations.
In individuals with above-knee amputation, a powered hip exoskeleton, which reduces the metabolic cost of walking by adding energy at the hip joint, greatly improves walking economy and has the potential to improve mobility. |
doi_str_mv | 10.1038/s41591-021-01515-2 |
format | Article |
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t
-test,
P
= 0.002) in six individuals with above-knee amputation walking on a treadmill. The observed metabolic cost improvement is equivalent to removing a 12-kg backpack from a nonamputee individual. All participants were able to walk overground with the exoskeleton, including starting and stopping, without notable changes in gait balance or stability. This study shows that assistance of the user’s residual limb with a powered hip exoskeleton is a viable solution for improving amputee walking economy. By significantly reducing the metabolic cost of walking, the proposed hip exoskeleton may have a considerable positive impact on mobility, improving the quality of life of individuals with above-knee amputations.
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t
-test,
P
= 0.002) in six individuals with above-knee amputation walking on a treadmill. The observed metabolic cost improvement is equivalent to removing a 12-kg backpack from a nonamputee individual. All participants were able to walk overground with the exoskeleton, including starting and stopping, without notable changes in gait balance or stability. This study shows that assistance of the user’s residual limb with a powered hip exoskeleton is a viable solution for improving amputee walking economy. By significantly reducing the metabolic cost of walking, the proposed hip exoskeleton may have a considerable positive impact on mobility, improving the quality of life of individuals with above-knee amputations.
In individuals with above-knee amputation, a powered hip exoskeleton, which reduces the metabolic cost of walking by adding energy at the hip joint, greatly improves walking economy and has the potential to improve mobility.</description><subject>639/166/985</subject><subject>639/166/988</subject><subject>692/308/2778</subject><subject>Ambulation aids</subject><subject>Amputation</subject><subject>Balance</subject><subject>Biomedical and Life Sciences</subject><subject>Biomedicine</subject><subject>Cancer Research</subject><subject>Complications and side effects</subject><subject>Economics</subject><subject>Exoskeleton</subject><subject>Exoskeletons</subject><subject>Gait</subject><subject>Hip</subject><subject>Implants, Artificial</subject><subject>Infectious Diseases</subject><subject>Innovations</subject><subject>Knee</subject><subject>Metabolic Diseases</subject><subject>Metabolism</subject><subject>Mobility</subject><subject>Molecular 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Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ishmael, Marshall K.</au><au>Archangeli, Dante</au><au>Lenzi, Tommaso</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Powered hip exoskeleton improves walking economy in individuals with above-knee amputation</atitle><jtitle>Nature medicine</jtitle><stitle>Nat Med</stitle><date>2021-10-01</date><risdate>2021</risdate><volume>27</volume><issue>10</issue><spage>1783</spage><epage>1788</epage><pages>1783-1788</pages><issn>1078-8956</issn><eissn>1546-170X</eissn><abstract>Above-knee amputation severely reduces the mobility and quality of life of millions of individuals. Walking with available leg prostheses is highly inefficient, and poor walking economy is a major problem limiting mobility. Here we show that an autonomous powered hip exoskeleton assisting the residual limb significantly improves metabolic walking economy by 15.6 ± 2.9% (mean ± s.e.m.; two-tailed paired
t
-test,
P
= 0.002) in six individuals with above-knee amputation walking on a treadmill. The observed metabolic cost improvement is equivalent to removing a 12-kg backpack from a nonamputee individual. All participants were able to walk overground with the exoskeleton, including starting and stopping, without notable changes in gait balance or stability. This study shows that assistance of the user’s residual limb with a powered hip exoskeleton is a viable solution for improving amputee walking economy. By significantly reducing the metabolic cost of walking, the proposed hip exoskeleton may have a considerable positive impact on mobility, improving the quality of life of individuals with above-knee amputations.
In individuals with above-knee amputation, a powered hip exoskeleton, which reduces the metabolic cost of walking by adding energy at the hip joint, greatly improves walking economy and has the potential to improve mobility.</abstract><cop>New York</cop><pub>Nature Publishing Group US</pub><doi>10.1038/s41591-021-01515-2</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-0957-6412</orcidid></addata></record> |
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subjects | 639/166/985 639/166/988 692/308/2778 Ambulation aids Amputation Balance Biomedical and Life Sciences Biomedicine Cancer Research Complications and side effects Economics Exoskeleton Exoskeletons Gait Hip Implants, Artificial Infectious Diseases Innovations Knee Metabolic Diseases Metabolism Mobility Molecular Medicine Neurosciences Patient outcomes Prostheses Prosthesis Prosthetics Quality of life Treadmills Walking |
title | Powered hip exoskeleton improves walking economy in individuals with above-knee amputation |
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