Pelvic girdle pain including SIJ dysfunction has been investigated in post partum populations. The Active Straight Leg Raise (ASLR) has been shown to be reliable in post partum pelvic pain. This test is thought to help assess hypermobility in the SIJ. This test has a positive likelihood ratio (+LR)= 14.5 and a negative likelihood ratio (-LR)= .14 which indicates that this is a good test to rule in or rule out pelvic girdle pain in pregnancy. This test is thought to help assess dysfunction of the SIJ. The Gillet test has recently been reported to indicate abnormal biomechanics on the stance side by Hungerford et al. Increased hamstring activation on the stance leg has been identified as indicative of abnormal SI motion. These two tests (ASLR and Gillet) are thought to be reflective of SIJ instability or abnormal movement in, respectively, pregnancy or low back patients.