Achilles tendon structure differs between competitive distance runners and nonrunners despite no clinical signs or symptoms of midsubstance tendinopathy

Journal of Applied Physiology
Todd J HullfishJosh R Baxter

Abstract

Achilles tendinopathy affects many running athletes and often leads to chronic pain and functional deficits. Although changes in tendon structure have been linked with tendinopathy, the effects of distance running on tendon structure are not well understood. Therefore, the purpose of this study was to characterize structural differences in the Achilles tendons in healthy young adults and competitive distance runners using quantitative ultrasound analyses. We hypothesized that competitive distance runners with no clinical signs or symptoms of tendinopathy would have quantitative signs of tendon damage, characterized by decreased collagen alignment and echogenicity, in addition to previous reports of thicker tendons. Longitudinal ultrasound images of the right Achilles tendon midsubstance were acquired in competitive distance runners and recreationally active adults. Collagen organization, mean echogenicity, and tendon thickness were quantified using image processing techniques. Clinical assessments confirmed that runners had no signs or symptoms of tendinopathy, and controls were only included if they had no history of Achilles tendon pain or injuries. Runner tendons were 40% less organized, 48% thicker, and 41% less echogenic c...Continue Reading

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Citations

Sep 28, 2018·Journal of Applied Physiology·Kenton L HaganJosh R Baxter
Jan 10, 2020·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Peter H T TranMichael Kjaer
Apr 4, 2021·International Journal of Environmental Research and Public Health·Agnieszka Wnuk-ScardaccioneJakub Wojdyła
Jun 26, 2021·Scandinavian Journal of Medicine & Science in Sports·Brian ElgartDavid J Berkoff

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Methods Mentioned

BETA
imaging techniques
imaging technique

Software Mentioned

ImageJ

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