By: Dr. Rani Helvey-Byers, PT, DPT, OCS Upward Facing Dog (Urdhva Mukha Svanasana) is a powerful backbend that strengthens the spine and opens the chest. However, for many practitioners, this pose can cause discomfort or even pain in the lower back. If you’ve ever felt strain in your lumbar spine while practicing this asana, you’re...