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Measuring Achilles tendon mechanical properties: a reliable, noninvasive method.

Authors
Type
Published Article
Journal
Journal of strength and conditioning research / National Strength & Conditioning Association
Publication Date
Volume
26
Issue
8
Pages
2017–2020
Identifiers
DOI: 10.1519/JSC.0b013e31825bb47f
PMID: 22561974
Source
Medline
License
Unknown

Abstract

The purpose of this technical report is to describe a cost-effective and highly reliable methodology to measure mechanical and material properties of the Achilles tendon. Subjects are positioned on an isokinetic dynamometer time synchronized to a diagnostic ultrasound device. A tendon fascicle distal to the soleus is visualized during a ramped isometric maximal plantarflexion contraction. Excursion of the fascicle and tendon torque output yield a force-elongation curve in which mechanical characteristics and material properties are derived. Excellent intrasession and intersession reliabilities were observed for both the dynamometer (intraclass correlation coefficient [ICC] 0.99, 0.95) and excursion (ICC 0.99, 0.93) measures. Practical applications for this methodology include examination of training regimes for optimal tendon adaptation and rehabilitation in the presence of tendinopathy.

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