PNOĒ is a respiratory gas analysis system designed to assess various parameters related to metabolic and cardiorespiratory performance. During the test, the individual breathes through a specialized mask while the system analyzes respiratory gases to generate data on different physiological indicators.

The assessment is non-invasive and typically completed within a short period of time. The results may provide information about parameters such as energy expenditure, exercise capacity, and metabolic responses. These data can serve as a general guide for personalized nutrition, exercise, and lifestyle planning.