Repeatability of breath acetone concentration during stress testing

The aim of the study was to evaluate the repeatability of the human breath acetone concentration during stress testing. Eight healthy men aged 19 to 34 years were tested (mean age 26.9 ± 1.4). Subjects performed a stress testing on cycle ergometer at twice-weekly intervals. As a result of processing the obtained data, a good similarity between the initial and repeated curves of the acetone concentration was found. In addition, a good repeatability of some parameters was revealed, which show the peculiarities of the change in acetone concentration in healthy individuals. The results obtained in this work can be useful in the creation of diagnostic methods that use the acetone concentration in the exhaled air.