The Active Straight Leg Raise (ASLR) test is a commonly used test in clinical routine– even recommended by guidelines- to assess  instability of the lumbar spine and sacroiliac joint as a potential cause of low back/pelvic pain. This study, following the trends of research  which highlight that poor motor control might be the result of pain and  not  the cause of it, investigated the effect of experimental pain in the outcome of the ASLR test.