Changes in Achilles tendon mechanical properties following eccentric heel drop exercise are specific to the free tendon

Obst, S.J., Newsham-West, R. and Barrett, R.S. (2015) Changes in Achilles tendon mechanical properties following eccentric heel drop exercise are specific to the free tendon. Scandinavian Journal of Medicine and Science in Sports, 26 4: 421-431. doi:10.1111/sms.12466


Author Obst, S.J.
Newsham-West, R.
Barrett, R.S.
Title Changes in Achilles tendon mechanical properties following eccentric heel drop exercise are specific to the free tendon
Journal name Scandinavian Journal of Medicine and Science in Sports   Check publisher's open access policy
ISSN 1600-0838
0905-7188
Publication date 2015-01-01
Sub-type Article (original research)
DOI 10.1111/sms.12466
Open Access Status Not Open Access
Volume 26
Issue 4
Start page 421
End page 431
Total pages 11
Place of publication West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing
Formatted abstract
Mechanical loading of the Achilles tendon during isolated eccentric contractions could induce immediate and region-dependent changes in mechanical properties. Three-dimensional ultrasound was used to examine the immediate effect of isolated eccentric exercise on the mechanical properties of the distal (free tendon) and proximal (gastrocnemii) regions of the Achilles tendon. Participants (n = 14) underwent two testing sessions in which tendon measurements were made at rest and during a 30% and 70% isometric plantar flexion contractions immediately before and after either: (a) 3 × 15 eccentric heel drops or (b) 10-min rest. There was a significant time-by-session interaction for free tendon length and strain for all loading conditions (P < 0.05). Pairwise comparisons revealed a significant increase in free tendon length and strain at all contraction intensities after eccentric exercise (P < 0.05). There was no significant time-by-session interaction for the gastrocnemii (medial or lateral) aponeurosis or tendon for any of the measured parameters. Immediate changes in Achilles tendon mechanical properties were specific to the free tendon and consistent with changes due to mechanical creep. These findings suggest that the mechanical properties of the free tendon may be more vulnerable to change with exercise compared with the gastrocnemii aponeurosis or tendon.
Keyword 3D ultrasound
Aponeurosis
Creep
Fatigue
Free tendon
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
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 3 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 26 Feb 2016, 21:18:43 EST by Ms Kate Rowe on behalf of Learning and Research Services (UQ Library)