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The musculature around the hip may be tight. I know I get hip impingement sometimes due to a femur fracture back I sustained in high school. Trying doing soft tissue mobilization on the TFL, glute muscles, IT band, quadratus lumborum and groin area. Then work on external and internal rotation of the hip, getting the hip set back in the capsule correctly and also try to do some downstream and upstream work like rolling your quads and your back, intercostals etc.