To clean tension and misalignment in the spine and learn to move from the breath, do the regular straight back sit up and add to this placing your hands flat on the spine where the back meets the legs. Do this with the purpose to breath, align and than move and you will feel your tension leaving and a new awareness to the alignment of the spine forming through good movement. Move the hands up and down the spine and see how you learn to move better and remember the purpose is your relaxation and self knowledge.