What is the method used to assess hamstring length in the Straight Leg Raise test?

The Straight Leg Raise test primarily assesses hamstring length by measuring hip flexion while the knee remains straight. This position effectively isolates the hamstrings, allowing for a clear evaluation of their flexibility and length. When the knee is fully extended, any restriction in hamstring length will limit how far the leg can be raised while maintaining proper position.

In this method, the pelvis should remain stable, preventing compensatory movements that could mask true hamstring tightness. Maintaining a straight knee is crucial because bending at the knee can shorten the muscle and potentially lead to a false indication of adequate hamstring length.

Other methods listed would not appropriately assess hamstring length in the context of the Straight Leg Raise test. For instance, hip flexion with a bent knee or hip extension with a bent knee would not isolate the hamstrings effectively, leading to mixed or unclear results regarding their flexibility. Similarly, hip abduction with a straight knee is unrelated to hamstring mechanics and would not yield useful information about hamstring length specifically. Thus, the approach of hip flexion with a straight knee is the most accurate for evaluating hamstring flexibility in this test.