Abstract: An exercise apparatus (1), comprising: a box-shaped element (2) configured to be transported on lorries and provided with a lower wall (3), an upper wall (4) and a lateral wall (5) which together form an inner space (6), with said lateral wall (5) having a plurality of faces (F1, F2, F3, F4) and comprising, on at least one of the faces (F1, F2, F3, F4), at least one portion (7) which is movable between a closed position (C), in which it forms a configuration (B) which minimises the dimensions of the box-shaped element (2), and an open position (A), in which the movable portion (7) projects towards the outside (8) of the box-shaped element (2) and forms an opening (9) in the lateral wall (5) designed to put the inner space (6) in communication with an outside environment (8); at least one exercise machine (10) to allow a user (35) to exercise, said exercise machine (10) being designed to occupy the inner space (6) of the box-shaped element (2) at least while in the configuration (B) of minimum dimensions; mean