Supplementary material with a series of analyses related to a manuscript titled "Impact of a homeostatic body’s hydration status as risk or resiliency factor, evaluated by hemodynamic measures, on different types of pain sensitization as pathways to a chronic pain syndrome" were conducted for indicating impact of de- and re-hydration events (evoked by within-subject ortho- and clino-static challenges) and hypo- and hyper-hydration states (assessed primary by between-subject variance in averaged cardiac output associated with age and body mass variances in the sample, and secondary by between-subject variance in the hair cortisol concentration) on blood volume-related cardiac and vascular mechanisms regulating blood pressure level.