Technique Tuesday: Hiatal Hernia, Acid Reflux and GERD In this week’s Technique Tuesday newsletter, blog post, and demonstration video we discuss hiatal hernias and their relationship to poor posture. A hiatal hernia occurs when the upper part of the stomach bulges through the hiatus of the diaphragm. While a small hiatal hernia usually won’t cause problems, a large one will allow food and acid to back up into the esophagus leading to heartburn or gastroesophageal reflux disease (GERD). GERD occ