A modular standing frame (10) is described herein. The modular standing frame has a chair module (12) adapted to raise and lower a user between sitting and standing postures. A distance between a knee pivot joint and a hip pivot joint is adjustable to fit a user and a distance between a seat back and the hip pivot joint is adjustable to fit the user, such that as the chair module moves from the sitting posture to the standing posture, there is substantially no shear between the user's body and the seat and the seat back of the chair module.
