Achilles tendinopathy and the pathologies that contribute to it have been a widely studied topic in multiple professions. Although a unified consensus and classification on the underlying pathology has not yet been reached, the transition from the term tendonitis to tendinosis has slowly been adopted and is now believed to follow a continuum. Previous misconception of an inflammatory pathophysiology has led to the development of inappropriate and unsuccessful treatment options, leaving the tendon unable to heal or strengthen adequately, increasing the risk of repeated injury and the development of chronic Achilles tendinopathy. Consequently, it is necessary to consider the pathophysiology, its effect on lower extremity function, and the biomechanical risk factors that contribute to the development of Achilles tendinopathy when developing a rehabilitation program in conjunction with new research and to address the underlying degeneration and failure to heal the lower limb. tendon. Tendinopathy is a generic description that includes many pathologies of clinical conditions resulting from chronic overuse in and around the tendon such as ruptures/tendonitis, tendinosis and paratendinitis, which can only be classified after histopathological examination (Maffulli, Sharma, & Luscombe, 2004; Khan, Cook, Bonar, Harcourt, & Astrom, 1999). There has been a shift in replacing the pathological term “tendinitis” with “tendinosis” as increasing research fails to detect the presence of prostaglandin-mediated inflammatory cell infiltration within the pathological tendon (Khan, Cook, & Kannus, 2002 ; Khan et al. 1999 ). The pathology of Achilles tendinosis is now attributed to a failure of the cellular matrix to adapt to repeated trauma. With fiber disorientation, ...... middle of paper ...... live treatment of chronic Achilles tendinopathy. Journal of the Canadian Medical Association, 1159-1165. Skjong, C. C., Meininger, A. K., & Ho, S. S. (2012). Treatment of tendinopathy: where is the evidence? Sports Medicine Clinics, 31(2), 329-350. Sussmilch-Leitch, S. P., Collins, N., Bialocerkowski, A. E., Warden, S. J., & Crossley, K. M. (2012). Physical therapies for Achilles tendinopathy: systematic review and meta-analysis. Journal of Foot and Ankle Research, 1-16. Witvrouw, E., Mahieu, N., Roosen, P., & McNair, P. (2007). The role of stretching in tendon injuries. British Journal of Sports Medicine, 224-226. Yu, J., park, D., & Gyuchang, L. (2013). Effect of eccentric strengthening on pain, muscle strength, endurance, and functional fitness factors in male patients with Achilles tendinopathy. American Journal of Physical Medicine and Rehabilitation , 92, 68-76.