A support device (2) for an exoskeleton system (1), the support device (2) comprising a wheeled frame (21), a displaceable connector (22) configured to connect to a lumbar portion (31) of an exoskeleton (3), and a powered mechanism connected to the wheeled frame (21) and the displaceable connector (22) for causing said displaceable connector (22) to move up and down with respect to the wheeled frame (21) between an upper position and a lower position,
- the support device (2) further comprising a foldable seat (23) connected to the wheeled frame (21), and a synchronization assembly (24) configured to fold/unfold said foldable seat (23) in synchronization with the movement of said displaceable connector (22),
- wherein the foldable seat (23) is configured to move up and down together with the displaceable connector (22),
- and wherein the synchronization assembly (24) is configured to select a desired height at which a synchronized process of folding/unfolding of the seat (23) takes place.