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.
Department of Physical and Occupational Therapy, Bispebjerg Hospital, Copenhagen, Denmark.
Eur J Appl Physiol. 2020 Mar;120(3):579-589. doi: 10.1007/s00421-020-04317-5. Epub 2020 Feb 14.
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.
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.
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).
These novel data suggest that the presence of tendinopathy diminishes intra-tendinous sliding in the Achilles tendon.
已有研究表明，健康的跟腱中存在肌腱层之间的差异位移，这种机制的变化可能导致剪切力，从而导致腱病。腱病中肌腱层之间的位移幅度尚不清楚。本研究的目的是比较单侧腱病患者与无症状对侧之间的跟腱层位移。
纳入 10 名（9 名男性和 1 名女性，年龄 45±10 岁，BMI：28±5）单侧跟腱病患者。使用超声在站立和坐姿下进行单侧脚跟抬高的动态过程中评估肌腱内运动。使用互相关算法确定斑点位移，在代表浅和深肌腱层的四个独立行中进行。
除了患病腿的站立状态外，所有状态下最浅层的位移都小于最深层。患病肌腱的位移差有减小的趋势（p=0.054）（患病侧：0.52±0.16mm vs. 无症状对侧：1.02±0.18mm）。
这些新数据表明，腱病的存在会减少跟腱内的滑动。
