Walking, for example, involves shifting of the body's weight from one foot to another, so freeing the first so that it may be lifted and moved forward.
In the full weight transfer, the center of gravity becomes vertically projected onto another body part (e.g., foot) freeing the first one so that it may be freely lifted or moved.
In partial weight transfer the center of gravity is shifted to project between the old and new support body part.
In some dance moves, such as ball change, the force produced by pushing with the new supporting foot at the moment of the partial weight transfer makes it possible to lift the previous support foot for a short time, followed by the drop back onto the first supporting foot subject to the gravity force.
Control of weight transfers is an important part of the partner dance technique.