There are 4 types of Achilles injury. Some injuries can display symptoms of all of the first 3 subtypes. Sometimes preceded by evidence of tightness in the calf muscles. Symptoms don't always relect the extent of pathology. Taping, orthotics and running shoes with stability properties in the rearfoot and midsole can help control pronation.
Correct fitting is also very important.
Strength exercises such as heel raises off a step are useful in cases where there is a demonstrated strength defecit and the tendon is relatively asymptomatic and stable. Advice should be sought before proceeding with this program. Cross training such as cycling, swimming or aqua jogging. NSW Sports Physiotherapy News Letter pp15-20.