[en] Introduction: Achilles tendinopathy accounts for 30-50% of all sports-related injuries. It accounts for an annual incidence of between 6% and 18% of injuries to runners. It does not always have a direct relationship with it as it can also affect the general population. Achilles tendinopathy is characterized by pain and swelling of the affected area, making the sufferer unable to perform certain activities. In addition, it produces chronic degeneration and micro tears in the tendon tissue. At present, when conservative treatment fails, such as rest, immobilization, plantar orthesis, NSAIDs, ultrasound, cryotherapy, eccentric exercise, infiltration of corticoids and analgesics, two of the alternative treatments used are the application of platelet-rich plasma and the use of shock waves. Despite the amount of literature on the subject, no conclusion has been reached as to which of the two treatments is more effective. Objectives: The main objective is to compare the efficacy of platelet-rich plasma against shock waves in the treatment of Achilles tendinopathy. The general hypothesis should answer the question whether the application of platelet-rich plasma has greater efficacy in the treatment of Achilles tendinopathy than the use of shock waves in patients over 18 years of age. Methods: This study will consist of a single-blind, parallel, randomized controlled clinical trial (RCT), considered a phase IV. The study population will be people suffering from Achilles tendinopathy between the ages of 18 and 45 who belong to the Ferrol Healthcare Area, which serves a population of 190,000 inhabitants.

[gl] Introducción: A tendinopatía aquilea representa un 30-50% de todas as lesión relacionadas co deporte. Supón unha incidencia anual entre o 6% e o 18% das lesións dos corredores. Non sempre teñen una relación directa con iste xa que tamen pode afectar a poboación xeral. A tendinopatía aquilea caracterízase pola dor e hinchazón da zona afectada, incapacitando ao que a podece para realizar determinadas actividades. Ademais, produce unha dexeneración crónica e micro desgarros do tecido tendinoso. Na actualidade, cando fracasa o tratamento conservador como é o reposo, inmovilización, ortesis plantares, AINES, ultrasonidos, crioterapia, exercicio excéntrico, infiltración de corticoides e analxésicos, dous dos tratamentos alternativos empregados son a aplicación de plasma rico en plaquetas e o uso de ondas de choque. A pesar da cantidade de bibliografía existente respecto diso, non se chegou a ningunha conclusión sobre cal dos dous tratamentos ten una maior eficacia. Obxectivos: O principal obxectivo é comparar a eficacia do plasma rico en plaquetas fronte ás ondas de choque no tratamento da tendinopatía aquilea. A hipótese xeral debe responder a pregunta de se ten a aplicación de plasma rico en plaquetas maior eficacia no tratamento de tendinopatía aquilea que o uso de ondas de choque en pacientes maiores de 18 anos. Material e método: Este estudo consistirá nun ensaio clínico controlado aleatorizado (ECCA), a simple cego, paralelo e considerado de fase IV. A poboación de estudo serán persoas que padecen tendinopatía aquilea comprendidas entre os 18 e 45 anos pertencentes a Área Sanitaria de Ferrol, a cal atende a una poboación de 190.000 habitantes.