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Resonance of about-weekly human heart rate rhythm with solar activity change
G Cornelissen1, F Halberg, H W Wendt
1University of Minnesota, Lyon Laboratories, Minneapolis 55455, USA. corne001@maroon.tc.umn.edu
Biologia
|December 1, 1996
Abstract:
In several human adults, certain solar activity rhythms may influence an about 7-day rhythm in heart rate. When no about-weekly feature was found in the rate of change in sunspot area, a measure of solar activity, the double amplitude of a circadian heart rate rhythm, approximated by the fit of a 7-day cosine curve, was lower, as was heart rate corresponds to about-weekly features in solar activity and/or relates to a sunspot cycle.