The Active Single Straight Leg Raise (Active):

The Active Straight Leg Raise is used to assess active hamstring flexibility, in relation to core stability. This screen is performed actively (instead of passive flexibility assessment) in order to see the true available range of motion your client has during life and sport. For example, it does not help the client to have flexible hamstrings if he cannot use them without straining the stability of the core to get that range of motion.                                                                                Pelvis stays still Range of motion = 80-90 degrees without either leg moving

Client lies supine with both legs straight and neutral and a natural curve in the low back. The client lifts up one leg, keeping that ankle relaxed and the leg straight. The opposite thigh should remain still and straight. Normal range of motion is approximately 80-90 degrees. Perform 3 reps on each side, observing when legs or pelvis are no longer still and stable. If one of the repetitions is done correctly, then a 2 is scored. The lowest score on a given side is indicated as the total test score.