Identification > Measurements > Methods of measurement > Measurement of physical activity

The physical activity determined by the oxygen demand of the organism. The measurement is possible direct and indirect methods. In indirect measurements of the value is calculated based on measurements of hemoglobin levels, arterial and venous saturation of blood volume and blood flow. To solve the problem of identification is much more informative is the direct measurement.

Direct measurement of oxygen consumption is conducted in the laboratory during the execution of physical exercises. Tested wear a special mask, which allows him to breathe a certain amount of fresh air, while exhaled air is captured and prevented from reaching the recorder, which allows to fix the amount of carbon dioxide has been allocated organism. Based on the data calculated volume of oxygen consumption during muscle activity. The measurement is made at a special ergospirometric device.