Poster (Scientific congresses and symposiums)
Intrinsic modification of tendon structure after concentric or excentric training
Kaux, Jean-François; Drion, Pierre; Besançon, Benoît et al.
20106th International Congress of EFOST
 

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Keywords :
tendinopathy; eccentric rehabilitation; mechanotransduction
Abstract :
[en] Introduction: It is well known that eccentric training is a successful way of treating chronic tendinopathy. Although clinical results are very positive, beneficial morphological and histological effects have not yet been elucidated. The aim of our experiment was to determine if there exist any intrinsic modifications in a tendon trained in concentric or eccentric modes, in a rat model, using an original method of measurement (cryo-jaws). Methods: 18 rats were divided into 3 groups: 6 for the control group, without physical restraint; 12 for a training of1 hour, 3 times a week, for 5 weeks, at a speed of 17m/min (1km/h), on a inclined treadmill: 6 rats running uphill at +15° for the concentric effort (group C) and 6 rats running downhill at -15° for the eccentric effort (group E). After this training period, the Achilles, patellar and tricipital tendons of both limbs were surgically removed in all 18 rats. Tendons taken from five rats of each group were subjected to a tensile test up to rupture using a “cryo” jaw. Tendons of the remaining rat of each group were subjected to a histological study. Results: The results showed significant changes in group E only: (1) an increase of the force required to rupture the patellar and tricipital tendons; (2) an improvement of the ratio between the force necessary to rupture the tricipital tendon and the body mass of the rats; (3) an increase of the surface area of the section of the tricipital tendon. No significant change was observed as far as constraint was concerned between groups. Histologically, we saw, in the group E, more peripheral blood vessels and a greater proportion of collagen. Conclusion: This study showed that the mechanical properties of tendon tissue are enhanced by eccentric training. Tendons become stronger, the amount of collagen increases and there is probably more interaction between collagen fibers (mechanotransduction).
Disciplines :
Orthopedics, rehabilitation & sports medicine
Author, co-author :
Kaux, Jean-François  ;  Université de Liège - ULiège > Département des sciences cliniques > Département des sciences cliniques
Drion, Pierre ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > GIGA-R:Méth. expér.des anim. de labo et éth. en expér. anim. - GIGA-R : Services généraux de l'Université
Besançon, Benoît
Libertiaux, Vincent ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Mécanique des solides
Croisier, Jean-Louis ;  Université de Liège - ULiège > Département des sciences de la motricité > Kinésithérapie générale et réadaptation
Forthomme, Bénédicte ;  Université de Liège - ULiège > Département des sciences de la motricité > Rééducation du membre supérieur
Colige, Alain ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Laboratoire des tissus conjonctifs
Le Goff, Caroline  ;  Université de Liège - ULiège > Chimie médicale
Franzen, Rachelle  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Neuro-anatomie
Defraigne, Jean-Olivier ;  Université de Liège - ULiège > Département des sciences cliniques > Chirurgie cardio-vasculaire et thoracique
Cescotto, Serge ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Mécanique des solides
Rickert, Markus
Crielaard, Jean-Michel ;  Université de Liège - ULiège > Département des sciences de la motricité > Evaluation et entraînement des aptitudes physiques - Médecine physique et réadaptation fonctionnelle
More authors (3 more) Less
Language :
English
Title :
Intrinsic modification of tendon structure after concentric or excentric training
Publication date :
25 November 2010
Event name :
6th International Congress of EFOST
Event organizer :
European Federation of National Associations of Orthopaedic Sports Traumatology
Event place :
Brussels, Belgium
Event date :
25th-27th Novembre 2010
Audience :
International
Available on ORBi :
since 18 November 2010

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