(WO9823332-A1)      The rolling mechanism has a main rolling section (V) which is rotated by a pedaller to provide bicycling exercise. The rolling section has two smaller rollers (R1,R2) providing a braking function, and making the pedaller exercise effort.    The braking rolling brake couple can be varied as a function of the speed of rotation of the roller. Preferably the arrangement for providing the rotation and braking is coupled to a measuring mechanism, for evaluating the speed.    ADVANTAGE -   Overcomes problems found in non motorised phases between operational motorised phases, where pedalling power required could change from maximum to zero at dead point, in simple and effective manner.    (EP942774-A1)      The rolling mechanism has a main rolling section (V) which is rotated by a pedaller to provide bicycling exercise. The rolling section has two smaller rollers (R1,R2) providing a braking function, and making the pedaller exercise effort.    The braking rolling brake couple can be varied as a function of the speed of rotation of the roller. Preferably the arrangement for providing the rotation and braking is coupled to a measuring mechanism, for evaluating the speed.    ADVANTAGE -   Overcomes problems found in non motorised phases between operational motorised phases, where pedalling power required could change from maximum to zero at dead point, in simple and effective manner.    (US6142911-A)      The rolling mechanism has a main rolling section (V) which is rotated by a pedaller to provide bicycling exercise. The rolling section has two smaller rollers (R1,R2) providing a braking function, and making the pedaller exercise effort.    The braking rolling brake couple can be varied as a function of the speed of rotation of the roller. Preferably the arrangement for providing the rotation and braking is coupled to a measuring mechanism, for evaluating the speed.    ADVANTAGE -   Overcomes problems found in non motorised phases between operational motorised phases, where pedalling power required could change from maximum to zero at dead point, in simple and effective manner.    (JP2001504377-W)      The rolling mechanism has a main rolling section (V) which is rotated by a pedaller to provide bicycling exercise. The rolling section has two smaller rollers (R1,R2) providing a braking function, and making the pedaller exercise effort.    The braking rolling brake couple can be varied as a function of the speed of rotation of the roller. Preferably the arrangement for providing the rotation and braking is coupled to a measuring mechanism, for evaluating the speed.    ADVANTAGE -   Overcomes problems found in non motorised phases between operational motorised phases, where pedalling power required could change from maximum to zero at dead point, in simple and effective manner.