Effects of back-support exoskeleton use on lower limb joint kinematics and kinetics during level walking

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dc.contributor.authorPark, Jang-Hoen
dc.contributor.authorLee, Youngjaeen
dc.contributor.authorMadinei, Samanen
dc.contributor.authorKim, Sun Wooken
dc.contributor.authorNussbaum, Maury A.en
dc.contributor.authorSrinivasan, Divyaen
dc.date.accessioned2022-05-05T17:55:39Zen
dc.date.available2022-05-05T17:55:39Zen
dc.date.issued2022-04-27en
dc.date.updated2022-05-05T16:22:01Zen
dc.description.abstractWe assessed the effects of using a passive back-support exoskeleton (BSE) on lower limb joint kinematics and kinetics during level walking. Twenty young, healthy participants completed level walking trials while wearing a BSE (backX<sup>TM</sup>) with three different levels of hip-extension support torque (i.e., no torque, low, and high) and in a control condition (no-BSE). When hip extension torques were required for gait-initial 0-10% and final 75-100% of the gait cycle-the BSE with high supportive torque provided ~ 10 Nm of external hip extension torque at each hip, resulting in beneficial changes in participants' gait patterns. Specifically, there was a ~ 10% reduction in muscle-generated hip extension torque and ~ 15-20% reduction in extensor power. During the stance-swing transition, however, BSE use produced undesirable changes in lower limb kinematics (e.g., 5-20% increase in ankle joint velocity) and kinetics (e.g., ~ 10% increase in hip flexor, knee extensor, and ankle plantarflexor powers). These latter changes likely stemmed from the need to increase mechanical energy for propelling the leg into the swing phase. BSE use may thus increase the metabolic cost of walking. Whether such use also leads to muscle fatigue and/or postural instability in long-distance walking needs to be confirmed in future work.en
dc.description.versionAccepted versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1007/s10439-022-02973-6en
dc.identifier.eissn1573-9686en
dc.identifier.issn0090-6964en
dc.identifier.orcidKim, Sun Wook [0000-0003-3624-1781]en
dc.identifier.orcidNussbaum, Maury [0000-0002-1887-8431]en
dc.identifier.other10.1007/s10439-022-02973-6 (PII)en
dc.identifier.pmid35478066en
dc.identifier.urihttp://hdl.handle.net/10919/109815en
dc.language.isoenen
dc.publisherSpringeren
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/35478066en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAssistive deviceen
dc.subjectGait biomechanicsen
dc.subjectHip extension torqueen
dc.subjectJoint poweren
dc.titleEffects of back-support exoskeleton use on lower limb joint kinematics and kinetics during level walkingen
dc.title.serialAnnals of Biomedical Engineeringen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dcterms.dateAccepted2022-04-19en
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Industrial and Systems Engineeringen
pubs.organisational-group/Virginia Tech/Faculty of Health Sciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

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