How to Reset the HPA Axis and Improve Vagal Tone

The cognitive behavioral technique is distress tolerance. Activities to reset the HPA axis and improve vagal tone that are to trigger the rest and digest to trigger the relaxation response. Yawning is another activity that stimulates deep breathing but it also triggers the Relaxation Response. Guided imagery can be helpful if they're having flashbacks, intrusive feelings or even a feeling that comes out of nowhere.