Allocation: The patients will have to fill out an initial questionnaire in order to be selected (Attachment 1). After that, the assistant doctor will do the physical diagnostic examination of the patient. Then, the US and XRay procedures will take place, in order complete the diagnostic assessment. The patient will be included in the protocol and duly randomized after the diagnostic confirmation is done via anamnesis and physical examination, and also after completion of supplementary tests, signature of the Informed Consent Form, and fulfilment of all the inclusion criteria and non-adequacy to the exclusion criteria. The following data will be collected to do the epidemiological: analysis of the lesions and interventions: Body mass index, Sex, Age, Sports practice (Yes/No), Presence of Haglung Deformity (Y/N), and the Presence of Enthesophyte (Y/N). Each non-transparent sealed envelope, numbered from 1 to 93, will contain either a paper with the word "physiotherapy" or with the words "physiotherapy and shock wave". Each treatment method will have the same number of envelopes. The patients will be initially assessed individually, being randomized and allocated in the same way. The intervention procedures will be the same, with the same positioning and preparations, but differing regarding the existence of a support at the applicator head of the shock wave apparatus in the group of patients without shock wave.