Three-dimensional morphology and strain of the human Achilles free tendon immediately following eccentric heel drop exercise

Obst, Steven J., Newsham-West, Richard and Barrett, Rod S. (2015) Three-dimensional morphology and strain of the human Achilles free tendon immediately following eccentric heel drop exercise. Journal of Experimental Biology, 218 24: 3894-3900. doi:10.1242/jeb.127175

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Author Obst, Steven J.
Newsham-West, Richard
Barrett, Rod S.
Title Three-dimensional morphology and strain of the human Achilles free tendon immediately following eccentric heel drop exercise
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
1477-9145
Publication date 2015-12
Sub-type Article (original research)
DOI 10.1242/jeb.127175
Open Access Status File (Publisher version)
Volume 218
Issue 24
Start page 3894
End page 3900
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Collection year 2016
Language eng
Formatted abstract
Our 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 bout 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 is primarily driven by changes in AP diameter strain and not ML diameter strain.
Keyword 3D ultrasound
Cross-sectional area
Diameter
Creep
In-Vivo
Mechanical-Properties
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Health and Rehabilitation Sciences Publications
Child Health Research Centre Publications
 
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