Proper functioning of organs and systems makes life interesting and harmonious. Diseases lead to impaired processes, therefore, to unpleasant sensations and limitations. The functional diagnostics room is one of the first on the way to restoring the body's work. Modern research methods help to identify pathologies at that early stage, when there are no clinical manifestations yet, to assess the functional capabilities of the body, to monitor the effectiveness of treatment. The most common areas of application of such methods are cardiology and pulmonology.