This is not the slow stretch with focused awareness. It doesn't require great strength or flexibility or balance. What it does ask of you is a commitment to keep going when you feel like stopping. Kundalini yoga combines vigorous, repetitive motions with fast breathing from the belly. I find it invigorating, a great mood elevator, a stimulus to creativity and a liberator of parts of me I didn't know were there.
Here's a book of Kundalini exercises. If you have favorite practices or a favorite video or book, please let me know.