The HIP Self-management Study
The HIPS-study will be an observer blinded, single-centre, parallel-group randomized controlled trial (RCT).

The main purpose of the study is:

To investigate the clinical effectiveness of a self- management program versus usual care for patients with greater trochanteric pain syndrome (GTPS).

H0: There is no difference between a self-management program and usual care on pain and function in patients with GTPS.
H1: There is a difference between a self-management program and usual care on pain and function in patients with GTPS.
To investigate if self-management is more cost-effective than usual care in the treatment of patients with GTPS.

Participants will be randomly allocated into one of two groups: 1) self-management program or 2) usual care.

Follow-up will be at 3-, 6- and 12-months.
- EligibilityCriteria: Inclusion Criteria:  Participants between 18 and 70 years of age History of lateral hip pain > 3 months Pain ≥ 3 on a numeric rating scale the last 3 months Pain at palpation of the greater trochanter region  In addition, lateral hip pain on at least one of the following tests:  Single leg stance test: standing 30 seconds on the affected leg FADER: passive stretch/compression of gluteus medius/minimus FADER-R: static muscle test with resistance to internal hip rotation ADD: passive stretch to hip adduction in sidelying ADD-R: resisted hip abduction in sidelying FABER (Patrick's) test  A positive test is defined as a spontaneous reproduction of the participant's lateral hip pain. In participants with bilateral lateral hip pain, the worst hip will be included, and presence of bilateral pain will be documented.  Exclusion Criteria:  Significant pain from the lumbar spine, causing referred pain to the hip or clinical signs of lumbar radiculopathy Moderate or severe hip osteoarthritis (OA)/total hip replacement (Kellgren-Lawrence grade ≥2, if relevant, confirmed by hip x-rays. If the participants have taken a previous appropriate x-ray within the last 6 months, they will not require a second x-ray) History of trauma or surgery on the affected side Not able to fill in questionnaires in Norwegian language Pregnancy Post-partum pelvic pain (<12 months) Active cancer - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - MaximumAge: 70 Years - StdAgeList: Adult, Older Adult