What indicates that the McKenzie Side Glide test should be performed?

The McKenzie Side Glide test is specifically performed to evaluate patients with scoliosis or lateral shift mechanics. This test aims to determine if the position of the spine contributes to the patient's symptoms and can help in assessing the treatment efficacy for conditions related to scoliosis. When there is a presence of symptoms that may be caused by the lateral shift of the spine or curvature consistent with scoliosis, the Side Glide test is indicated.

The rationale for not choosing the other options is that while persistent back pain and limited range of motion can certainly be present in a variety of musculoskeletal conditions, they are not specific indicators for performing the McKenzie Side Glide test. Similarly, although leg weakness might accompany certain spinal issues, it does not directly warrant the use of this particular test, as the focus is more on assessing lateralized spinal mechanics rather than leg strength.