Proper breathing allows to control the physiological and psychological reactions to stress, which is extremely important in sports. In addition, oxygenated and well-nourished muscles are more flexible and less susceptible to injury. However, in everyday life, breathing disorders can be the cause of many ailments. The aim of the study is to check whether the respiratory parameters monitoring system, which includes a specially designed elastic belt worn on the chest, together with a mobile application, can significantly help improve the efficiency of exercisers. An inductive sensor belt with a smartphone application was used for the research, which allows to record and monitor breathing in normal conditions and during intense physical activity. The device was created as a result of a project financed by the National Center for Research and Development, which is dedicated to patients with respiratory diseases. Comparative measurement was carried out on healthy persons, which were carried out on a classic treadmill (speed 5 km/h and 9 km/h) and on a Vacu class treadmill used for intensive training of the lower half of the body. In this case, the vacuum-based Vacu technology is additionally supported by infrared rays, with the ability to set the intensity of the load provided for aerobic training in a sealed capsule. The obtained results indicate the validity of ongoing supervision of respiratory parameters in order to maintain full control over its course and optimize the intensity of training, which will contribute to balancing the heart rate, better oxygenation of muscles, less fatigue after training and shortening recovery time.