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dc.contributor.authorGerus, Pauline
dc.contributor.authorRao, Guillaume
dc.contributor.authorBerton, Eric
dc.contributor.editorFarshid Guilak
dc.date.accessioned2017-08-31T12:31:00Z
dc.date.available2017-08-31T12:31:00Z
dc.date.issued2011
dc.date.modified2012-05-23T22:09:44Z
dc.identifier.issn00219290
dc.identifier.doi10.1016/j.jbiomech.2011.05.021
dc.identifier.urihttp://hdl.handle.net/10072/45005
dc.description.abstractThe ultrasonography contributes to investigate in vivo tendon force-strain relationship during isometric contraction. In previous studies, different methods are available to estimate the tendon strain, using different loading rates and models to fit the tendon force-strain relationship. This study was aimed to propose a standard method to characterize the in vivo tendon force-strain relationship. We investigated the influence on the force-strain relationship for medialis gastrocnemius (MG) of (1) one method which takes into account probe and joint movements to estimate the instantaneous tendon length, (2) models used to fit the force-strain relationship for uniaxial test (polynomial vs. Ogden), and (3) the loading rate on tendon strain. Subjects performed ramp-up contraction during isometric contractions at two different target speeds: 1.5 s and minimal time with ultrasound probe fixed over the muscle-tendon junction of the MG muscle. The used method requires three markers on ultrasound probe and a marker on calcaneum to take into account all movements, and was compared to the strain estimated using ultrasound images only. The method using ultrasound image only overestimated the tendon strain from 40% of maximal force. The polynomial model showed similar fitting results than the Ogden model (R⽰.98). A loading rate effect was found on tendon strain, showing a higher strain when loading rate decreases. The characterization of tendon force-strain relationship needs to be standardized by taking into account all movements to estimate tendon strain and controlling the loading rate. The polynomial model appears to be appropriate to represent the tendon force-strain relationship.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent196286 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoen_US
dc.publisherElsevier
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom2333
dc.relation.ispartofpageto2336
dc.relation.ispartofissue12
dc.relation.ispartofjournalJournal of Biomechanics
dc.relation.ispartofvolume44
dc.rights.retentionY
dc.subject.fieldofresearchBiomechanics
dc.subject.fieldofresearchBiomedical Engineering
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchcode110601
dc.subject.fieldofresearchcode0903
dc.subject.fieldofresearchcode0913
dc.subject.fieldofresearchcode1106
dc.titleA method to characterize in vivo tendon force–strain relationship by combining ultrasonography, motion capture and loading rates
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2011 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.date.issued2011
gro.hasfulltextFull Text
gro.griffith.authorGerus, Pauline


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