From a purely mechanical point of view, standing up (i.e. getting out of a chair) is the reverse from sitting down, although as M.Feldenkrais observed, only when the movement is right (i.e. fluid) can this reversibility be attained.
Pushing oneself out of the chair and its opposite, collapsing into the chair, destroys this fludity.
Getting into the chair should be just that: "getting into". Not "falling into", which is what actually happens when one collapses.
