Measuring Achilles tendon mechanical properties: a reliable, noninvasive method |
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| Authors: | Joseph Michael F Lillie Kurtis R Bergeron Daniel J Denegar Craig R |
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| Institution: | Human Performance Laboratory, Physical Therapy Program, Department of Kinesiology, University of Connecticut, Storrs, Connecticut, USA.joseph@uconn.edu |
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| 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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