Tendinopathies typically are characterized by excessive loading (1, 2) and overuse resulting in tendon breakdown. Pain in the Achilles tendon is seen commonly in middle-aged athletes (30-50 years of age) who are involved in a variety of sports (3-8); running is the sport most commonly reported (prevalence≤9%). (3, 4, 8-11) Pain is experienced either in the mid-portion of the tendon or at the tendon's bony insertion and is a common cause of disability. (12) Although often associated with active individuals, pathology of and pain in the Achilles tendon also are reported in the sedentary population. (3, 4, 13, 14)