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Wearing a back-support exoskeleton impairs single-step balance recovery performance following a forward loss of balance – An exploratory study

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dc.contributor.authorPark, Jang-Hoen
dc.contributor.authorLee, Youngjaeen
dc.contributor.authorMadigan, Michael L.en
dc.contributor.authorKim, Sunwooken
dc.contributor.authorNussbaum, Maury A.en
dc.contributor.authorSrinivasan, Divyaen
dc.date.accessioned2022-11-14T14:06:47Zen
dc.date.available2022-11-14T14:06:47Zen
dc.date.issued2022-11-01en
dc.date.updated2022-11-12T16:21:52Zen
dc.description.abstractBack-support exoskeletons (BSEs) are a promising ergonomic intervention for reducing physical demands on the low-back, but little is known regarding whether BSE use alters balance recovery following external perturbations. Hence, we investigated the effects of wearing a BSE on single-step balance recovery following a forward loss of balance. Sixteen (8 M, 8F) young, healthy participants were released from static forward-leaning postures and attempted to recover their balance with a single step while wearing a BSE (backXTM) with three different levels of support torque (i.e., no torque, low, and high) and in a control condition (no exoskeleton). Lean angle was increased until they failed in two consecutive trials to recover their balance with a single step. The maximum lean angle from which individuals could successfully recover was not significantly altered when wearing the BSE. However, wearing the BSE under all torque conditions increased reaction times. The BSE also impeded hip flexion (i.e., decrease in both peak hip flexion angle and angular velocity), resulting in decreased peak knee flexion velocity, knee range of motion, and step length. Measures of the margin of stability decreased significantly in the high-torque BSE condition. Overall, our results suggest that use of a BSE that provides external hip extension torque impairs balance recovery responses. Future work extending kinetic analyses to recovery responses, as well as a study of recovery when responding to slips and trips while walking, would offer a more complete picture of how a BSE may impact balance recovery following a loss of balance.en
dc.description.versionAccepted versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.jbiomech.2022.111352en
dc.identifier.eissn1873-2380en
dc.identifier.issn0021-9290en
dc.identifier.orcidNussbaum, Maury [0000-0002-1887-8431]en
dc.identifier.otherS0021-9290(22)00393-1 (PII)en
dc.identifier.pmid36308843en
dc.identifier.urihttp://hdl.handle.net/10919/112581en
dc.identifier.volume144en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/36308843en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectBalance recovery responseen
dc.subjectOccupational exoskeletonen
dc.subjectReactive steppingen
dc.subjectTether-releaseen
dc.subjectInjury (total) Accidents/Adverse Effectsen
dc.subjectClinical Researchen
dc.titleWearing a back-support exoskeleton impairs single-step balance recovery performance following a forward loss of balance – An exploratory studyen
dc.title.serialJournal of Biomechanicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherJournal Articleen
dcterms.dateAccepted2022-10-14en
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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