What indicates shortened proximal hamstrings during a Straight Leg Raise test?

In the context of the Straight Leg Raise (SLR) test, a finding of less than 80 degrees of hip flexion indicates shortened proximal hamstrings. During this test, the patient lies supine, and the therapist raises the leg while keeping the knee straight. The normal range for hip flexion during this test typically falls between 80 and 90 degrees, representing adequate length and flexibility of the hamstring muscles.

When the range of motion observed is less than 80 degrees, it suggests that the hamstrings are not allowing full mobility due to tightness or shortening. This is clinically significant, as it indicates that interventions such as stretching or other modalities may be required to improve hamstring length and overall function.

In contrast, hip flexion greater than 80 degrees would suggest that the hamstrings are likely of normal length and flexibility, and therefore would not indicate tightness. Hence, the measurement directly reflects the condition of the proximal hamstrings in relation to their length and functionality.