Apparatus for supporting a user in a forward-leaning position with base proximity adjustability

An apparatus for supporting a user includes a faceplate, an arm, and a base. The faceplate has an opening to receive a user's face. The arm is attached to the faceplate and the base. The base includes a base slide that is slidable within a slot of a base body. The base slide includes one or more lock pins that releasably engage one of multiple holes in a lock bar. The lock bar is mechanically coupled to a button body. When the button body is pulled distally, the lock bar moves away from the base slide such that the lock pin(s) is/are removed from the corresponding hole(s) to allow the base slide to slide within the slot. When the button body is released, the lock bar moves towards the base slide such that the lock pin(s) is/are inserted into the same or different hole(s) to lock the slide's position.