Do you have an S-Posture in your golf set up position? An S Posture is when a player has too much arch in their lower back, putting way too much stress that can cause pain & injuries. When you have too much arch, it causes the abs to relax. This can cause Loss of Posture or Reverse Spine Angle during your backswing. S Posture is often caused by a series of muscle imbalances, called Lower Crossed Syndrome (seen below) mostly due to prolonged static postures, such as sitting. Try these yoga poses that I do with my students to help fix your S Posture.