This static work position is very uncomfortable and unhealthy. You can change it by yourself. Sit on the edge of the chair with straddled legs and flexed knees. Your back is straight and the backrest fixed lower back. The forearms are placed on the surface of the table, but a wrist doesn´t print to the edge of the table. The large joint angles of upper and lower extremitas are 90 degrees. The eyes are of top of the screen. You can change position of your backbone several times during the day
Posted in Škola chrbtice.