Christian Couppé1,2,3, René B Svensson4,5, Christian Orhammer Josefsen4,6, Esben Kjeldgaard4,6, S Peter Magnusson4,6,5. 1. Department of Orthopaedic Surgery M, Faculty of Health and Medical Sciences, Institute of Sports Medicine Copenhagen, Bispebjerg Hospital and Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark. christian.couppe@regionh.dk. 2. Department of Physical and Occupational Therapy, Bispebjerg Hospital, Copenhagen, Denmark. christian.couppe@regionh.dk. 3. IOC Research Center Copenhagen Center for Injury Prevention and Protection of Athlete Health, Bispebjerg Hospital, Nielsine Nielsensvej 10, 2400, Copenhagen, NV, Denmark. christian.couppe@regionh.dk. 4. Department of Orthopaedic Surgery M, Faculty of Health and Medical Sciences, Institute of Sports Medicine Copenhagen, Bispebjerg Hospital and Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark. 5. IOC Research Center Copenhagen Center for Injury Prevention and Protection of Athlete Health, Bispebjerg Hospital, Nielsine Nielsensvej 10, 2400, Copenhagen, NV, Denmark. 6. Department of Physical and Occupational Therapy, Bispebjerg Hospital, Copenhagen, Denmark.
Abstract
PURPOSE: Differential displacement between tendon layers has been shown to occur within the healthy Achilles tendon, and changes of this mechanism have been proposed to result in shear forces, which potentially could lead to tendinopathy. The magnitude of displacement between the tendon layers in tendinopathy is unknown. The purpose of this study was to investigate Achilles tendon layer displacement in individuals suffering from unilateral tendinopathy compared with the asymptomatic contralateral side. METHODS: Ten participants (9 men and 1 woman 45 ± 10 years, BMI: 28 ± 5) with unilateral Achilles tendinopathy were included. Intra-tendinous motion was assessed using ultrasonography during dynamic unilateral heel rises in standing and seated position. Speckle displacement was determined using a cross-correlation algorithm, in four independent rows, representing superficial and deep tendon layers. RESULTS: The most superficial layer displaced less than the deepest in all condition, except standing for the tendinopathic leg. There was a strong tendency (p = 0.054) for the displacement difference being reduced in the tendinopathic tendon (Tendinopathic side: 0.52 ± 0.16 mm vs. asymptomatic contralateral side: 1.02 ± 0.18 mm). CONCLUSION: These novel data suggest that the presence of tendinopathy diminishes intra-tendinous sliding in the Achilles tendon.
PURPOSE: Differential displacement between tendon layers has been shown to occur within the healthy Achilles tendon, and changes of this mechanism have been proposed to result in shear forces, which potentially could lead to tendinopathy. The magnitude of displacement between the tendon layers in tendinopathy is unknown. The purpose of this study was to investigate Achilles tendon layer displacement in individuals suffering from unilateral tendinopathy compared with the asymptomatic contralateral side. METHODS: Ten participants (9 men and 1 woman 45 ± 10 years, BMI: 28 ± 5) with unilateral Achilles tendinopathy were included. Intra-tendinous motion was assessed using ultrasonography during dynamic unilateral heel rises in standing and seated position. Speckle displacement was determined using a cross-correlation algorithm, in four independent rows, representing superficial and deep tendon layers. RESULTS: The most superficial layer displaced less than the deepest in all condition, except standing for the tendinopathic leg. There was a strong tendency (p = 0.054) for the displacement difference being reduced in the tendinopathic tendon (Tendinopathic side: 0.52 ± 0.16 mm vs. asymptomatic contralateral side: 1.02 ± 0.18 mm). CONCLUSION: These novel data suggest that the presence of tendinopathy diminishes intra-tendinous sliding in the Achilles tendon.
Authors: M Edama; M Kubo; H Onishi; T Takabayashi; T Inai; E Yokoyama; W Hiroshi; N Satoshi; I Kageyama Journal: Scand J Med Sci Sports Date: 2014-12-30 Impact factor: 4.221
Authors: Alfonso Gautieri; Fabian S Passini; Unai Silván; Manuel Guizar-Sicairos; Giulia Carimati; Piero Volpi; Matteo Moretti; Herbert Schoenhuber; Alberto Redaelli; Martin Berli; Jess G Snedeker Journal: Matrix Biol Date: 2016-09-09 Impact factor: 11.583
Authors: S de Jonge; C van den Berg; R J de Vos; H J L van der Heide; A Weir; J A N Verhaar; S M A Bierma-Zeinstra; J L Tol Journal: Br J Sports Med Date: 2011-10 Impact factor: 13.800
Authors: Chavaunne T Thorpe; Chineye P Udeze; Helen L Birch; Peter D Clegg; Hazel R C Screen Journal: J R Soc Interface Date: 2012-07-04 Impact factor: 4.118
Authors: Marieke de Mos; Benno van El; Jeroen DeGroot; Holger Jahr; Hans T M van Schie; Ewoud R van Arkel; Hans Tol; Rien Heijboer; Gerjo J V M van Osch; Jan A N Verhaar Journal: Am J Sports Med Date: 2007-05-03 Impact factor: 6.202
Authors: R Meerwaldt; R Graaff; P H N Oomen; T P Links; J J Jager; N L Alderson; S R Thorpe; J W Baynes; R O B Gans; A J Smit Journal: Diabetologia Date: 2004-07-09 Impact factor: 10.122