A pedal (2) for swinging motion of a foot is pivotally mounted on a swinging shaft (4) which extends from a side wall of a drive housing (1), a drive mechanism (7) is arranged in the drive housing (1) and creates a forced swinging movement of the pedal (2) around the axis (3) of the swinging shaft (4), the axis (3) of swinging of the pedal (2) is arranged under the upper contact surface (11) of the pedal (2) and under the intersection of a vertical a with the upper contact surface (11) of the pedal (2), created by perpendicular projection of the ankle joint (10) to the pedal (2) so that the movement of the foot (12) is realized around the outer diameter of a circle having a centre in the axis (3) of swinging of the pedal (2). The drive housing (1) may be provided with outriggers (8) for adjusting the inclination towards the base (9).
