Range of motion and symptom intensity during SLR neurodynamic testing. Straight leg raise neurodynamic test results are presented for hip flexion range of motion in degrees (A) and symptom intensity (0-10 scale) (B). Gray dotted lined body diagrams represents the PF/SLR test and black lined body diagrams represent the DF/SLR test. Significance is indicated by an * and was set at p < 0.05. A) Hip flexion to the onset of symptoms (P1) and to the maximally tolerated position (P2) is significantly greater than the zeroed START position (p < 0.05). The differences between the PF/SLR and the DF/SLR are 4.3° at P1 and 5.4° at P2 (p < 0.05). B) Symptom intensity on a 0-10 point scale is presented for each SLR. The gray dotted line represents the PF/SLR test and the black line represents the DF/SLR test. START position is full manual knee extension prior to hip flexion while supine lying. P1 represents the moment of first onset of symptoms or the first increase above resting symptoms and P2 represents the maximally tolerated symptom position. Symptom intensity is significantly increased at both P1 and P2 over START position values (p < 0.05). There was 0.3-point significantly greater symptom intensity at P1 when in the DF/SLR test compared to the PF/SLR test.