Modeling the Metabolic Reductions of a Passive Back-Support Exoskeleton

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dc.contributor.authorAlemi, Mohammad Mehdien
dc.contributor.authorSimon, Athulya A.en
dc.contributor.authorGeissinger, Jack H.en
dc.contributor.authorAsbeck, Alan T.en
dc.date.accessioned2022-02-17T16:10:22Zen
dc.date.available2022-02-17T16:10:22Zen
dc.date.issued2022-01-13en
dc.date.updated2022-02-04T01:33:52Zen
dc.description.abstractDespite several attempts to quantify the metabolic savings resulting from the use of passive back-support exoskeletons (BSEs), no study has modeled the metabolic change while wearing an exoskeleton during lifting. The objectives of this study were to: 1) quantify the metabolic reductions due to the VT-Lowe's exoskeleton during lifting; and 2) provide a comprehensive model to estimate the metabolic reductions from using a passive BSE. In this study, 15 healthy adults (13M, 2F) of ages 20 to 34 years (mean=25.33, SD=4.43) performed repeated freestyle lifting and lowering of an empty box and a box with 20% of their bodyweight. Oxygen consumption and metabolic expenditure data were collected. A model for metabolic expenditure was developed and fitted with the experimental data of two prior studies and the without-exoskeleton experimental results. The metabolic cost model was then modified to reflect the effect of the exoskeleton. The experimental results revealed that VT-Lowe's exoskeleton significantly lowered the oxygen consumption by ~9% for an empty box and 8% for a 20% bodyweight box, which corresponds to a net metabolic cost reduction of ~12% and ~9%, respectively. The mean metabolic difference (i.e., without-exo minus with-exo) and the 95% confidence interval were 0.36 and (0.2-0.52) [Watts/kg] for 0% bodyweight, and 0.43 and (0.18-0.69) [Watts/kg] for 20% bodyweight. Our modeling predictions for with-exoskeleton conditions were precise, with absolute freestyle prediction errors of <2.1%. The model developed in this study can be modified based on different study designs, and can assist researchers in enhancing designs of future lifting exoskeletons.en
dc.description.versionAccepted versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1152/japplphysiol.00171.2021en
dc.identifier.eissn1522-1601en
dc.identifier.issn8750-7587en
dc.identifier.orcidAsbeck, Alan [0000-0002-5589-7797]en
dc.identifier.pmid35023764en
dc.identifier.urihttp://hdl.handle.net/10919/108391en
dc.language.isoenen
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/35023764en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectback support exoskeletonen
dc.subjectenergy expenditureen
dc.subjectlifting exoskeletonen
dc.subjectmetabolic cost modelingen
dc.subjectmetabolic cost reductionen
dc.subject06 Biological Sciencesen
dc.subject11 Medical and Health Sciencesen
dc.subjectPhysiologyen
dc.titleModeling the Metabolic Reductions of a Passive Back-Support Exoskeletonen
dc.title.serialJournal of Applied Physiologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherJournal Articleen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Mechanical Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

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