Tendinopathy refers to a disease of a tendon. More specifically, it can refer to: tendinitis and tendinosis.
Tendon injury arise from a combination of intrinsic and extrinsic factors; acute tendon injuries may be predominantly caused by extrinsic factors, whereas in overuse syndromes as in the case of tendinopathy it may be caused by multifactorial combinations of both intrinsic and extrinsic factors. An example of an intrinsic factor for tendinopathies are: poor biomechanics such as limb malaligments and hyperpronation that may cause increased traction loads acting on the foot and ankle that may increase the incidence of Achilles, flexor hallucis longus muscle, and tibialis posterior muscle tendinopathies.
The exact etiology of tendinopathies has not been fully elucidated and different stresses may induce varying responses. There are multifactorial theories such as tensile overload, tenocyte related collagen synthesis disruption, tendon load induced ischemia, neural sprouting, and histological adaptive compressive responses seen as some of the causative factors that give rise to activity disruption and disability due to tendinopathies. The most commonly accepted cause for this condition however is seen to be an overuse syndrome in combination with intrinsic and extrinsic factors leading to what may be seen as a progressive interference or the failing of the innate healing response. Source: Wikipedia