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2018-08-24Zeitschriftenartikel DOI: 10.18452/19639
The Maximum Lyapunov Exponent During Walking and Running: Reliability Assessment of Different Marker-Sets
dc.contributor.authorEkizos, Antonis
dc.contributor.authorSantuz, Alessandro
dc.contributor.authorSchroll, Arno
dc.contributor.authorArampatzis, Adamantios
dc.date.accessioned2018-12-28T09:04:25Z
dc.date.available2018-12-28T09:04:25Z
dc.date.issued2018-08-24
dc.identifier.issn1664-042X
dc.identifier.urihttp://edoc.hu-berlin.de/18452/20415
dc.descriptionThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.
dc.description.abstractThe maximum Lyapunov exponent (MLE) has often been suggested as the prominent measure for evaluation of dynamic stability of locomotion in pathological and healthy population. Although the popularity of the MLE has increased in the last years, there is scarce information on the reliability of the method, especially during running. The purpose of the current study was, thus, to examine the reliability of the MLE during both walking and running. Sixteen participants walked and ran on a treadmill completing two measurement blocks (i.e., two trials per day for three consecutive days per block) separated by 2 months on average. Six different marker-sets on the trunk were analyzed. Intraday, interday and between blocks reliability was assessed using the intraclass correlation coefficient (ICC) and the root mean square difference (RMSD). The MLE was on average significantly higher (p < 0.001) in running (1.836 ± 0.080) compared to walking (1.386 ± 0.207). All marker-sets showed excellent ICCs (>0.90) during walking and mostly good ICCs (>0.75) during running. The RMSD ranged from 0.023 to 0.047 for walking and from 0.018 to 0.050 for running. The reliability was better when comparing MLE values between blocks (ICCs: 0.965–0.991 and 0.768–0.961; RMSD: 0.023–0.034 and 0.018–0.027 for walking and running respectively), and worse when considering trials of the same day (ICCs: 0.946–0.980 and 0.739–0.844; RMSD: 0.042–0.047 and 0.045–0.050 for walking and running respectively). Further, different marker-sets affect the reliability of the MLE in both walking and running. Our findings provide evidence that the assessment of dynamic stability using the MLE is reliable in both walking and running. More trials spread over more than 1 day should be considered in study designs with increased demands of accuracy independent of the locomotion condition.eng
dc.language.isoeng
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectreliabilityeng
dc.subjectlocomotioneng
dc.subjecthumanseng
dc.subjectnonlinear dynamicseng
dc.subjectlocal dynamic stabilityeng
dc.subjectmethodologyeng
dc.subjectLyapunov analysiseng
dc.subject.ddc610 Medizin und Gesundheit
dc.titleThe Maximum Lyapunov Exponent During Walking and Running: Reliability Assessment of Different Marker-Sets
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/20415-7
dc.identifier.doihttp://dx.doi.org/10.18452/19639
dc.identifier.alephidBV045140640
dc.type.versionpublishedVersion
local.edoc.pages11
local.edoc.type-nameZeitschriftenartikel
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
dc.description.versionPeer Reviewed
dcterms.bibliographicCitation.doi10.3389/fphys.2018.01101
dcterms.bibliographicCitation.journaltitleFrontiers in physiology
dcterms.bibliographicCitation.volume9
dcterms.bibliographicCitation.articlenumber1101
dcterms.bibliographicCitation.originalpublishernameFrontiers Research Foundation
dcterms.bibliographicCitation.originalpublisherplaceLausanne
bua.departmentLebenswissenschaftliche Fakultät

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