The University of Southampton
University of Southampton Institutional Repository

The effect of eccentric and concentric calf muscle training on Achilles tendon stiffness

Morrissey, Dylan, Roskilly, Anna, Twycross-Lewis, Richard, Isinkaye, Tomide, Screen, Hazel, Woledge, Roger and Bader, Dan (2011) The effect of eccentric and concentric calf muscle training on Achilles tendon stiffness Clinical Rehabilitation, 25, (3), pp. 238-247. (doi:10.1177/0269215510382600). (PMID:20980351).

Record type: Article


Objective: To compare in vivo effects of eccentric and concentric calf muscle training on Achilles tendon stiffness, in subjects without tendinopathy.

Methods: Thirty-eight recreational athletes completed 6 weeks eccentric (6 males, 13 females, 21.6?±?2.2 years) or concentric training (8 males, 11 females, 21.1?±?2.0 years). Achilles tendon stiffness, tendon modulus and single-leg jump height were measured before and after intervention. Exercise adherence was recorded using a diary.

Results: All data are reported as mean?±?SD. Groups were matched for height and weight but the eccentric training group were more active at baseline (P?<?0.05). Tendon stiffness was higher in the eccentrically trained group at baseline compared to the concentrically trained group (20.9?±?7.3 N/mm v 13.38?±?4.66 N/mm; P?=?0.001) and decreased significantly after eccentric training (to 17.2 (?±?5.9) N/mm (P?=?0.035)). There was no stiffness change in the concentric group (P?=?0.405). Stiffness modulus showed similar changes to stiffness. An inverse correlation was found between initial, and subsequent, reduction in stiffness (r?=??0.66). Jump height did not change and no correlation between stiffness change and adherence was observed in either group (r?=?0.01).

Conclusions: Six weeks of eccentric training can alter Achilles tendon stiffness while a matched concentric programme shows no similar effects. Studies in patients with Achilles tendinopathy are warranted.

PDF morrissey_2011.pdf - Version of Record
Restricted to Repository staff only
Download (187kB)

More information

Published date: March 2011


Local EPrints ID: 189397
ISSN: 0269-2155
PURE UUID: 5703683f-c3bf-4231-aaf5-23175e6bbd92
ORCID for Dan Bader: ORCID iD

Catalogue record

Date deposited: 02 Jun 2011 15:39
Last modified: 18 Jul 2017 11:40

Export record



Author: Dylan Morrissey
Author: Anna Roskilly
Author: Richard Twycross-Lewis
Author: Tomide Isinkaye
Author: Hazel Screen
Author: Roger Woledge
Author: Dan Bader ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.