Abstract: An operator-interactive adjustable workstation including a support frame, a seat adapted for engagement with an operator, and a worksurface having an enlarged upper surface. A motion connecting structure connects between the frame, seat and worksurface for permitting the positions of the seat and worksurface to be simultaneously adjusted relative to the frame. An operator-interactive structure interconnects to the connecting structure for controlling position-adjusting movement of the seat and worksurface in response to an operator-imposed controlling force. A manually-releasable brake cooperates with the connecting structure for normally maintaining it in a fixed positional relationship to define stationary positions for the seat and worksurface.