Exclusion Criteria: Previous surgery involving the affected foot or ankle; History or documented evidence of autoimmune or peripheral vascular diseases; History or documented evidence of peripheral neuropathy (nervous compression syndrome, tarsal tunnel syndrome).History or documented evidence of systemic inflammatory disease a (rheumatoid arthritis, spondylitis, Reiter Syndrome, etc.); Non-Insertional or mixed tendinopathy (insertional and non-insertional); Previous infiltration in the affected tendon over the six months preceding the initial assessment; Beginning of the present pain, due to a trauma; Gross or congenital deformity overweighting the triceps sural muscle, being the main aetiology of the present disease; Pregnancy; Any condition that represents a contraindication of the proposed therapies; Any physical or social limitation that makes the protocol continuation unviable; Impossibility or incapacity to sign the Free Informed Consent Form; History or documented evidence concerning the blood coagulation disorders (treatment with anti-coagulant, excluding aspirin); Use of heart pacemaker;