Training role
Under a training role , even Trainers or just roll called, is understood in the cycling training resources on the training with a normal therefore preferably your own, set on the body measurements, racing , training on road and rail can be simulated. This distinguishes the device from the bicycle ergometer , in which the force is transmitted directly from the bottom bracket shaft to the braking device and the measuring devices and only the saddle, the handlebars and the cranks with the pedals have been taken over from the conventional bicycle.
Technical advancements and use as a competition device
Many of today's commercially available training roles can also offer the trainee greater incentives for training via PC trips in virtual worlds or by playing videos at a specific speed. There are already competitions in organized racing leagues due to the time measurements made possible on firmly defined routes. In this way, this training device has become a competition device.