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Related Experiment Video

Updated: Jun 2, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
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Published on: August 8, 2019

BLOOD PRESSURE, HEART RATE AND MELATONIN CYCLES SYNCHRONIZATION WITH THE SEASON, EARTH MAGNETISM AND SOLAR FLARES.

G Cornélissen1, F Halberg, R B Sothern

  • 1Halberg Chronobiology Center, University of Minnesota, Minneapolis, Minnesota, USA.

Scripta Medica
|May 14, 2011
PubMed
Summary

Human vascular data reveals cyclical patterns linked to environmental factors. Blood pressure and heart rate exhibit ~0.41, ~0.5, and ~1.0-year cycles, correlating with solar flares, Earth

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Last Updated: Jun 2, 2026

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06:53

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

Published on: November 11, 2016

Area of Science:

  • Chronobiology and Environmental Health
  • Physiological Rhythms and External Influences
  • Transdisciplinary Data Analysis in Human Physiology

Background:

  • Human circulating melatonin exhibits spectral components with periods of ~0.41, ~0.5, and ~1.0 year.
  • These components show circadian stage-dependency, with daytime measurements following circannual variation and nighttime samples characterized by a half-year period.
  • Environmental factors like seasons, geomagnetics, and solar flares are known to influence biological rhythms.

Purpose of the Study:

  • To investigate the presence and coexistence of multiple spectral components in long-term vascular data.
  • To analyze the relationship between systolic/diastolic blood pressure (BP) and heart rate (HR) with environmental cycles.
  • To explore the potential cosmic-biotic transfer of information mediated through these frequency windows.

Main Methods:

  • A multi-component model using cosine curves with periods of 0.41, 0.50, and 1.00 year was fitted to vascular data.
  • Data included weekly means of systolic and diastolic blood pressure and heart rate, self-measured over 39 years.
  • Statistical significance criteria were used to assess the nonstationary characteristics and intermittent presence of components.

Main Results:

  • All three spectral components (~0.41, ~0.5, ~1.0 year) were found to coexist intermittently in vascular data.
  • Blood pressure and heart rate showed intermittent synchronization with seasons (~1.0 year), Earth's magnetism (~0.5 year), and solar flares (~0.42 year).
  • The ~0.41-year HR cycle correlated significantly with the total solar flare index, indicating a shared ~11-year sunspot cycle influence.

Conclusions:

  • Human vascular parameters exhibit complex, nonstationary cyclical patterns influenced by environmental factors.
  • The findings support the hypothesis of cosmic-biotic information transfer via specific frequency windows.
  • Differences in time-varying behavior between blood pressure and heart rate warrant further investigation.