Following up on my last column about stretching your body to help release tension, here’s another exercise, the Hip-Buttock Stretch, which focuses on stiffness that may develop in your lower back and hips.1. To start: Lie on your back on a mat. Raise your legs into a 90-degree angle, with your lower legs parallel to the ceiling.Place your right ankle over your left thigh. If necessary, use your hands to get your legs into position and then...