The Corival can be easily controlled by all known stress ECG and pulmonary devices. It is one of the most popular ergometers worldwide. It has a unique low start-up load of 7 Watt. The stress tests performed with this ergometer are reliable and reproducible. The system is extremely accurate and is one of the most important Lode principles. The Corival has a current electro-magnetic braking system. The device has a simple, retractable wheel which makes transportation very easy. The workload can be adjusted to a range of between 7 and 1,000 Watt. The noise level of the Corival is reduced to a minimum.