Solar-Terrestrial Influences Laboratory, Bulgarian Academy
A group of 86 healthy volunteers was examined on each working day at one and the same time for each person during periods of high solar activity. Data about systolic and diastolic blood pressure, pulse pressure, heart rate and subjective psycho-physiological complaints were gathered. In total 2799 registrations for each of the physiological parameters were obtained. In this study hourly Dst-index values and hourly data about intensity of cosmic ray (neutron monitor) were used. The statistical method of the analysis of variance (ANOVA) and post-hoc analysis were applied to check the significance of the influence of geomagnetic activity and cosmic ray variations on the physiological and psycho-physiological parameters under consideration. Results revealed statistically significant increments for the mean systolic and diastolic blood pressure, pulse pressure and subjective complaints of the group with geomagnetic activity increase and cosmic ray intensity decrease.