Evaluation of the Effectiveness of Extracorporeal Shockwave Therapy in Patients With Patellar Tendinopathy on Its Micromorphology

Inclusion Criteria: * Patient is a recreational athlete performing intensive sport activity loading patellar tendon (running, jumping, strength training etc.) at least 3 days in a week for minimum of 1 hour per session, * is in age between 18-40 years, * has a patellar tendon pain, which limits (at least in part) the quality of normal daily or sports activities, * has clinical manifestation of patellar tendinopathy (pain and impaired function) confirmed by clinician, * has symptoms only in one leg, the other one is asymptomatic. Exclusion Criteria: * Any contraindication for ESWT is present (according to International Society for Medical Shockwave Treatment (ISMST) consensus at https://shockwavetherapy.org), * Patient is aware of any symptomatic mechanical tendon damage in the past (e.g., partial or complete rupture in relation to the injury), * neurological, oncological, or systemic disease (e.g., neuropathy, lupus or rheumatic arthritis) coexists, * is/was already treated for PT elsewhere (e.g., platelet-rich plasma therapy, physiotherapy) * is using blood thinning medications or statins.