Achilles tendon thickness reduces immediately after a marathon

Isabelle Scott, Peter Malliaras, Alex Tardioli, Sarah Hales, Dylan Morrissey, Filippo Migliorini, Nicola Maffulli

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1 Citation (Scopus)


Background: The purpose of the present investigation was to evaluate the immediate effect of running a marathon on Achilles tendon anteroposterior thickness. Methods: In 25 runners who took part in the London marathon, ultrasonography was used to measure the Achilles tendon thickness pre- and immediately post-marathon and to identify any structural abnormalities indicating tendinopathy. Pain was recorded using a numerical rating scale at baseline and post-marathon. Twenty-one participants were included in the final analysis. Results: Running a marathon resulted in a significant decrease (− 13%, p < 0.01) in anteroposterior diameter of the Achilles tendon immediately following the marathon. There was no change in the proportion of Achilles tendons with structural abnormalities (34%) or pain (12%) following the marathon (p > 0.05). Conclusion: Running a marathon resulted in an immediate reduction in anteroposterior diameter of the Achilles tendon. This finding may have implications for injury prevention and recovery following a marathon.

Original languageEnglish
Article number562
Number of pages6
JournalJournal of Orthopaedic Surgery and Research
Issue number1
Publication statusPublished - Dec 2022


  • Achilles tendon
  • Fluid flux
  • Marathon
  • Tendinopathy
  • Ultrasound

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