Janie,
When I worked with survivors of domestic violence I found this to be more true than not. I began integrating Qi Gong into my practice at the beginning of each empowerment session. I found the focused movement allowed for survivors to quiet the voices of the past and the current stresses enough to dream and visualize. I use a very simple routine which incorporates at the end visualization. I had clients who began doing it on their own outside of empowerment group with self-reported, positive results.
I'd be happy to chat anytime with more information. All of my information is anecdotal.