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 (42, 43, 46, 47, 48, 48', 49, 49') and the actuating drive is arranged on the pedestal, wherein the actuating drive is formed to drive at least one of the roller feet (49, 49'). 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 (42, 43, 46, 47, 48, 48', 49, 49') and the actuating drive is arranged on the pedestal, wherein the actuating drive is formed to drive at least one of the roller feet (49, 49'). 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 (42, 43, 46, 47, 48, 48', 49, 49') and the actuating drive is arranged on the pedestal, wherein the actuating drive is formed to drive at least one of the roller feet (49, 49').