Seat position from front door-post
The seat position affects the space between the seat front right corner and the front door-post, as well as the distance from the backrest of the seat to the front doorpost. The space must be large enaugh to let the subjects easily lift their feet in or out. The critical action for the subjects was to lift their legs and bend their knees to let their legs and feet pass the front door-post while swivelling sitting on the seat.