An ergometer , especially exercise bike, with a tipping stable frame , to which a seat for a user and a pedal unit to be operated by the user are arranged, and a pedestal supporting the frame with feet for resting on a surface, wherein: the pedal unit acts on a braking device , and a control device is provided, which controls the braking device , and to which at least one sensor for detecting a training performance generated by the user is connected, the control device cooperates with a processing unit , which is adapted to determine a measure of success from the training performance generated by the user with regard to a training reference, the control device cooperates with a signal unit , which is formed to generate a signal for a progress indicator based on the measure of success, an actuating drive is provided, which displaces the frame with seat and pedal unit in the longitudinal direction in a motorized manner, and the actuating drive is controlled automatically by the processing unit as a function of the signal for the progress indicator, characterized in that the pedestal has roller feet and the actuating drive is arranged on the pedestal , wherein the actuating drive is formed to drive at least one of the roller feet . a tipping stable frame , to which a seat for a user and a pedal unit to be operated by the user are arranged, and a pedestal supporting the frame with feet for resting on a surface, wherein: the pedal unit acts on a braking device , and a control device is provided, which controls the braking device , and to which at least one sensor for detecting a training performance generated by the user is connected, the control device cooperates with a processing unit , which is adapted to determine a measure of success from the training performance generated by the user with regard to a training reference, the control device cooperates with a signal unit , which is formed to generate a signal for a progress indicator based on the measure of success, an actuating drive is provided, which displaces the frame with seat and pedal unit in the longitudinal direction in a motorized manner, and the actuating drive is controlled automatically by the processing unit as a function of the signal for the progress indicator, characterized in that the pedestal has roller feet and the actuating drive is arranged on the pedestal , wherein the actuating drive is formed to drive at least one of the roller feet . the pedal unit acts on a braking device , and a control device is provided, which controls the braking device , and to which at least one sensor for detecting a training performance generated by the user is connected, the control device cooperates with a processing unit , which is adapted to determine a measure of success from the training performance generated by the user with regard to a training reference, the control device cooperates with a signal unit , which is formed to generate a signal for a progress indicator based on the measure of success, an actuating drive is provided, which displaces the frame with seat and pedal unit in the longitudinal direction in a motorized manner, and the actuating drive is controlled automatically by the processing unit as a function of the signal for the progress indicator, characterized in that the pedestal has roller feet and the actuating drive is arranged on the pedestal , wherein the actuating drive is formed to drive at least one of the roller feet . <EOS>