Altered motor control strategies in subjects with sacroiliac joint pain during the active straight-leg-raise test.

Study Design: An experimental study of respiratory function and kinematics of the diaphragm and pelvic floor in subjects with a clinical diagnosis of sacroiliac joint pain and in a comparable pain-free subject group was conducted.

Objective: To gain insight into the motor control strategies of subjects with sacroiliac joint pain and the resultant effect on breathing pattern.

Summary Of Background Data: The active straight-leg-raise test has been proposed as a clinical test for the assessment of load transfer through the pelvis.