If you're an anxious person, practising yoga regularly could help to regulate your stress response. From regulating breathing to breaking the worry cycle, Calvin Holbrook examines the benefits of yoga for anxiety. Plus, discover some great videos to get you started.    Most of us have experienced feelings of anxiety during our lives. From a small case of butterflies in the stomach to full-blown panic, anxiety is a natural response to what we see as stressful situations, and one that ca