Figure 4

The Double leg lift-lower (DLL-L) test (reproduced with permission from Movement Performance Solutions). The DLL-L test was used to test the ability to prevent extension and flexion of the lumbar spine during defined movement of the hip, performed supine. The test was classified as a high threshold test. Photos illustrates examples of views during the test. Start position: The subject lay in crook lying (45° hip flexion), knees and feet together with arms folded across chest. A pressure biofeedback unit (Chattanooga Group, Hixon, TN) was positioned between the lumbar lordosis and bench and inflated to a pressure of 40 mmHg. Test movement: While preventing the lumbar spine from moving, the subject lifted both feet off the bench to 90° hip flexion and then returned to the starting position. Criteria: Pass: < 5 mmHg away from the initiating 40 mmHg while no movement in lumbar spine.