Movie S2. Practicing of breathing techniques (cyclic hyperventilation and breath retention) and cardiorespiratory and biochemical changes (text overlays) in a representative subject of the trained group during the endotoxemia experiment. The data in the text overlays were sampled from the monitor and from arterial blood gas analyses. Green, red, purple, and white text overlays indicate the parameters on the monitor. Data of this subject during the cycles of hyperventilation and breath retention shown in this video are also presented in Fig. 2. The subject provided written informed consent.