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British Journal of Sports Medicine 2009;43:873-874; doi:10.1136/bjsm.2009.067413
Copyright © 2009 BMJ Publishing Group Ltd & British Association of Sport and Exercise Medicine.

SPORTSMEDUPDATE

SportsMedUpdate

Professor Martin P Schwellnus

University of Cape Town, South Africa

The first 150 words of the full text of this article appear below.

The mechanism for efficacy of eccentric loading in Achilles tendon injury; an in vivo study in humans

{blacktriangleright} Rees JD, Lichtwark GA, Wolman RL, Wilson AM. Rheumatology 2008;47:1493–7.

Background:

Eccentric (as opposed to concentric) exercise training has been advocated in the treatment of Achilles tendon injury — however, the mechanism for this is not well documented

Research question/s:

What is the possible mechanism for the beneficial effect of eccentric exercise in Achilles tendinopathy?

Methodology:

Subjects: Seven healthy subjects (19–41 years)(male = 4, female = 3)

Experimental procedure: All the subjects were assessed and then tested in a laboratory where changes in tendon force and length changes were determined (utilising a combination of motion analysis, force plate data, electromyographic data and real-time ultrasound data) during eccentric (ECC) and concentric (CONC) loading exercises of the Achilles tendon.

Measures of outcome: Peak tendon force (N), tendon length (change), frequency of oscillations in tendon force (inflections per cycle)

Main finding/s:

Peak tendon force and tendon length: No significant differences in peak tendon force or tendon length . . . [Full text of this article]


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