Gastrocnemius tendon length and strain are different when assessed using straight or curved tendon model

Stosic, J. and Finni, T. (2011) Gastrocnemius tendon length and strain are different when assessed using straight or curved tendon model. European Journal of Applied Physiology, 111 12: 3151-3154. doi:10.1007/s00421-011-1929-9


Author Stosic, J.
Finni, T.
Title Gastrocnemius tendon length and strain are different when assessed using straight or curved tendon model
Journal name European Journal of Applied Physiology   Check publisher's open access policy
ISSN 1439-6319
1439-6327
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1007/s00421-011-1929-9
Open Access Status Not Open Access
Volume 111
Issue 12
Start page 3151
End page 3154
Total pages 4
Place of publication Heidelberg, Germany
Publisher Springer
Abstract The present study investigated the effects of tendon curvature on measurements of tendon length using 3D-kinematic analysis. Curved and straight tendon models were employed for assessing medial gastrocnemius tendon length and strain during hopping (N = 8). Tendon curvature was identified using small reflective markers placed on the skin surface along the length of the tendon and a sum of vectors between the markers from the calcaneous up to the marker at the origin of tendon was calculated. The straight tendon was defined as a length of vector from the calcaneous to the marker at the origin of tendon. The curved tendon method yielded 5.0 ± 1.3 mm longer tendon (p < 0.001) than the straight tendon model. Tendon elongation was 2.1 ± 1.6 mm and peak strain 1.3 ± 0.7% smaller in curved than in straight tendon model (p\0.01). The results suggest that the commonly used straight tendon model underestimate slightly but significantly the true tendon length but overestimate the strain and elongation.
Keyword Achilles tendon
Hopping
Tendon length
Tendon strain
Ultrasonography
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Human Movement and Nutrition Sciences Publications
 
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