A sitting apparatus having: a frame; an upwardly facing surface on the frame for supporting a user in a sitting position; a first arm support on the frame defining a first surface against which a user's arm can be rested with the user in the sitting position on the upwardly facing surface; and a first connecting assembly acing between the frame and first arm support. The first connecting assembly and first arm support are configured so that the first arm support surface can pivot relative to the frame around at least first and second different axes to change a relationship between the first arm support surface and the frame.