START 2000M ergospirometer is a portable unit for exercise tests of respiratory and circulatory systems held in natural conditions running, biking, rowing, sailing, etc.) during a training, competition, or rehabilitation without loading devices such as ergometer or treadmill. Thanks to application of a low resistant pneumotach headpiece patented by MES, it is possible to measure minute ventilation for many hours. CO2 and O2 analysers and wireless pulse recording provide for full recording of the most important ergospirometric parameters. START 2000M stores exercise up to 6 hours. The recorded results are transmitted to the computer for analysis, graphic presentation, printout and storage. This unit may also be operated in laboratories with direct preview of the measured values. Loads may be set on ergometer, treadmill, or other devices. Lab option may be extended with 1-12 ECG leads with full analysis of values, preview in real time, and storage.