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dc.contributor.authorObst, Steven J
dc.contributor.authorNewsham-West, Richard
dc.contributor.authorBarrett, Rod S
dc.description.abstractOur understanding of the immediate effects of exercise on Achilles free tendon transverse morphology is limited to single site measurements acquired at rest using 2D ultrasound. The purpose of this study was to provide a detailed 3D description of changes in Achilles free tendon morphology immediately following a single clinical dose of exercise. Freehand 3D ultrasound was used to measure Achilles free tendon length, and regional cross-sectional area (CSA), medio-lateral (ML) diameter and antero-posterior (AP) diameter in healthy young adults (n=14) at rest and during isometric muscle contraction, immediately before and after 3×15 eccentric heel drops. Post-exercise reductions in transverse strain were limited to CSA and AP diameter in the mid-proximal region of the Achilles free tendon during muscle contraction. The change in CSA strain during muscle contraction was significantly correlated to the change in longitudinal strain (r=−0.72); and the change in AP diameter strain (r=0.64). Overall findings suggest the Achilles free tendon experiences a complex change in 3D morphology following eccentric heel drop exercise that manifests under contractile, but not rest conditions, is most pronounced in the mid-proximal tendon, and primarily driven by changes in AP diameter strain and not ML diameter strain.
dc.publisherThe Company of Biologists
dc.relation.ispartofjournalJournal of Experimental Biology
dc.subject.fieldofresearchBiological Sciences not elsewhere classified
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchMedical and Health Sciences
dc.titleThree-dimensional morphology and strain of the human Achilles free tendon immediately following eccentric heel drop exercise
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyrightSelf-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the author[s] for more information.
gro.hasfulltextNo Full Text
gro.griffith.authorBarrett, Rod
gro.griffith.authorObst, Steven J.
gro.griffith.authorNewsham-West, Richard J.

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