I was wondering how your body reacts to having attention below the navel during meditation. I'm still doing I AM meditation (5 min) but since I've moved my attention, uddiyana bandha is so tight that it's hard to breathe.
The shaking practice from Qigong is helping me a great deal to get the energy out of the head. Also it's a great practice to loosen up the muscle tension in the body to prepare it for meditation.