Shock Wave Therapy Plus Exercise in GTPS

Inclusion Criteria: * Unilateral hip pain of four weeks or longer duration * Pain to palpation in the greater trochanteric area at physical examination * Pain in hip end-range abduction/rotation/adduction at physical examination * Gluteal tendinopathy, in absence of full thickness tears at a sonographic examination of the gluteal tendons * Adult age and written informed consent Exclusion Criteria: * No hip osteoarthritis, diagnosed according to Altman's criteria * No history of knee osteoarthritis * No history of rheumatologic diseases * No previous fractures or surgery in the affected limb * No clinical signs of lumbar radiculopathy at physical examination * No corticosteroid injections, since the onset of the current pain episode * No general contraindication to shock wave therapy (pregnancy, bleeding disorders or anticoagulant drug usage, cancer in the focal area)