Ultrasonographic outcomes
The ultrasonographic outcomes are measured by a PhD candidate with 2 years of experience performing ultrasound measurements of the Achilles tendon. A standardised imaging procedure is used to ensure repeatability. Ultrasound examinations for this study will be performed during baseline assessment and all follow‐up visits after inclusion in the RCT. No specific instructions will be provided about activities before the consultation. The participants will be placed in a prone position on the examination table, and the ankle will be placed over the table in a relaxed position. All ultrasounds will be bilateral according to a standardised protocol using the Aixplorer machine (SuperSonic Imagine, Aix-En-Provence, France) equipped with a 12-MHz superficial linear transducer. Participants will be placed in a prone position with their legs extended. The examination will start with grayscale B mode, power Doppler ultrasound, and end with shear wave elastography.