This is widely practiced in sports. Before starting of sprint, sports persons perform auto stretching of muscles, ligaments and fascia. Exact benefit is not known. It is supposed to warm up tissues before major activity. This is supposed to provide flexibility and therefore a greater range of movement. The person takes up the position with the appropriate structure or tissues (hamstrings) on the stretch, feels the tightness and holds for 30–60 seconds; then as the tightness reduces he takes up the slack and holds again. This is repeated 3–4 times. The procedure is then applied to the opposite side. The technique should be performed daily.