title: Does Schumann resonance affect our blood pressure?
abstract: OBJECTIVE
  To investigate whether Schumann resonance (SR) affects blood pressure (BP), heart rate (HR), and depression and, if so, whether the putative BP reactivity to SR (BPR-SR) is associated with health-related lifestyle (HLS), disease-related illnesses (DRI), and depression.
  
  
  METHODS
  A sample of 56 adults in Urausu, Hokkaido, Japan, wore an ambulatory BP monitor, except for the time in the shower, for seven consecutive days. They completed the Geriatric Depression Scale-Short Form and a health survey questionnaire on HLS and DRI. Group mean differences and within-individual differences in systolic (S) and diastolic (D) BP, mean arterial pressure (MAP), double product (DP), and HR were, respectively, compared between normal and enhanced SR days, using Student's t-test. Correlations between BPR-SR and other characteristics (i.e. age, gender, HLS, DRI, subjective health, and depression) were analyzed, using Pearson's product moment correlation.
  
  
  CONCLUSIONS
  Group mean SBP, DBP, MAP, and DP for enhanced SR days were lower than those for normal days (P=0.005-0.036). DRI was negatively associated with BPR-SR in SBP, DBP, MAP, and DP (P=0.003-0.024), suggesting a better health status for those who showed lower BP on enhanced SR days. HLS was negatively associated with BPR-SR in DBP and MAP (P=0.016-0.029). Males showed higher BPR-SR in DBP and MAP than females (P=0.004-0.016). Neither subjective health nor depression was significantly associated with BPR-SR. Future studies based on larger sample sizes are planned to see whether possible health effects can be generalized.
authors.affiliation: Division of Neurocardiology and Chronoecology, Tokyo Women's Medical University, Medical Center East, Tokyo, Japan.
authors.forename: G
authors.initials: G
authors.lastname: Mitsutake
authors.forename: K
authors.initials: K
authors.lastname: Otsuka
authors.forename: M
authors.initials: M
authors.lastname: Hayakawa
authors.forename: M
authors.initials: M
authors.lastname: Sekiguchi
authors.forename: G
authors.initials: G
authors.lastname: Cornélissen
authors.forename: F
authors.initials: F
authors.lastname: Halberg
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D018660:Blood Pressure Monitoring, Ambulatory; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology / Q000523:psychology; D004574:Electromagnetic Fields; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D012727:Sex Characteristics; D019445:Solar Activity