What causes Achilles tendinosis?
Achilles tendinosis is caused by repetitive mechanical overload of the tendon that exceeds its ability to adapt. Common contributing factors include sudden increases in training volume or intensity, reduced calf strength, limited ankle mobility, prolonged standing, and changes in footwear or surface.
It is frequently seen in runners and active individuals but can also occur in people who are less active. Pain may be worse at the start of activity and improve as the tendon warms up, before returning later. Identifying and modifying these contributing factors is central to effective management.