In the long-sitting test, what indicates a positive result for anterior and posterior tests?

In the long-sitting test, the evaluation of leg length helps identify whether there is an anterior or posterior rotation of the pelvis. The correct interpretation indicates that a positive result for the anterior test occurs when the leg length changes from long to short. This change suggests that the innominate bone on the affected side has rotated anteriorly, resulting in a shorter appearance of that leg in comparison to the other.

Conversely, in the posterior test, a positive result is indicated when the leg length changes from short to long. This signifies a posterior rotation of the pelvis, where the shorter leg appears to lengthen relative to the other side.

Understanding this dynamic aids in the assessment of pelvic alignment and potential sacroiliac joint dysfunction. Recognizing these changes helps physical therapists and clinicians develop targeted treatment plans for musculoskeletal dysfunctions related to pelvic positioning.