Walkers with really tight hamstrings or lower back problems may wish to start by using this low-stress stretch. Begin by lying on the ground and positioning the non-stretching leg so that it supports your weight while making a triangle with the ground. Try to lift the other leg, holding it as straight as you can. The more flexible you are, the closer to your torso you should be able to pull your leg. Ideally, your leg should be perpendicular to the ground. If, like Jack, you can’t achieve the ideal position, that’s fine. Always remember, stretch within your own limits.