I was lying in a bunk in the caravan feeling quite miserable. Feeling down , my back hurting between the shoulder blades from sleeping in the caravan , and it was raining. I decided I’d try to send some energy from my lower dantian to my back. I imagined releasing some energy and let it flow down via the root up the back to the spine between the shoulder blades. I could feel the warmth flowing. I imagined my back being healthy and supple.
Don’t know yet if it helped, but it was a surprising sensation and my abdomen is still warm as I write this.