Relationship between Improvement of FFD by Hold-Relax on Pelvis Motion and Initial Length of Hamstrings

Abstract

The purpose of this study was to clarify whether the length of the hamstring influences the improvement of finger-floor distance. We investigated straight leg-raising before physical therapy and the change in the value of finger-floor-distance after physical therapy. Among the subjects indicating a finger-floor distance of less than 0 cm, we created a PNF group (41 people, average age, 21) and a non-PNF group (24 people, average age, 20). We performed the hold-relax technique for PNF back pelvic lift pattern in the PNF group. From the result, the PNF group showed a significant increase in finger-floor distance (p<0.05), but there was no correlation between straight leg-raising before performance of the hold-relax technique and the changed value of finger-floor distance after performing the technique (p<0.05). The result shows that hold-relax on PNF back pelvic lift pattern improved finger-floor distance, and suggests it is not influenced by the initial length of the hamstring.