Inflammation of the rope-like Achilles tendon that attaches to both calf muscles and the heel bone. Symptoms: stiffness and tenderness along the back of the ankle, especially in the morning. It tends to ease off during running but returns afterwards. Common causes: Tight calf muscles or stiff, inflexible feet or a sudden increase in training or too much speed work (especially on an athletics track). What to do: Use ice to reduce inflammation, especially after running, and stretch your calves with both a straight and bent leg. Avoid running hills and speed work. Do some �eccentric calf exercises� to help the tendon to heal.