[Influence of geomagnetic activity on the cardiorespiratory system in healthy humans]

Changes in a number of respiration and circulation parameters during magnetic storms of varying intensity were analyzed in 126 normal humans belonging to two age groups: 19-21 yr. old young men and women (29 of each) and 51-53 yr. old men (n = 36) and women (n = 32). Geomagnetic components D, H and Z were used. Systolic pressure, respiration volume, minute respiration volume and peak expiration rate were shown to be the most labile characteristics of the cardiorespiratory system responding by increases on magnetodisturbed days. The parameters under study exhibited sexual and age differences equally on quiescent and magnetodisturbed days. Adaptation to growing tension of the magnetic field of Earth involves the neuroendocrine system and manifests itself by activation of the sympathetic nervous system entailing relative shifts in the cardiorespiratory parameters under study.