Biofeedback
Biofeedback can be used to induce relaxation. It has been shown to lower blood glucose levels/HbA1C as well as depression and anxiety scores. In one randomized control trial of biofeedback vs. educational sessions, there were persistent effects three months after cessation of the groups.(1)
1. McGinnis RA et al. Biofeedback-assisted relaxation in type 2 diabetes. Diabetes Care 2005,
Sep;28(9):2145-9.