title: Association between sense of coherence and heart rate variability in healthy subjects.
abstract: OBJECTIVE
  This report investigates whether there is any association between sense of coherence (SOC), as a coping measure in confronting stressful conditions, and heart rate variability (HRV), as a measure of the cardiac autonomic nervous system during the daily life pattern.
  
  
  METHODS
  Sixteen healthy university students (14 males and 2 females) filled in the validated Japanese version of the SOC-13 questionnaire before being informed about the study protocol. For each participant, we calculated 5-minute HRV indices using logarithmically transformed data on frequency domains for HRV derived by 24-hour Holter monitoring. Frequency domains for HRV recordings were investigated for the 24-hour time periods.
  
  
  RESULTS
  The correlation coefficient between the SOC scores and the high frequency power of HRV (0.15-0.40) was positively significant during the resting sitting position (r≥0.60, P<0.05). After grouping SOC scores by the median, the high frequency domain of HRV was higher in high SOC subjects for most of the 24-hour time period.
  
  
  CONCLUSIONS
  A higher SOC could modulate the parasympathetic tone of cardiac autonomic activity, especially during the resting sitting position.
authors: Department of Welfare Promotion and Epidemiology, Faculty of Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, 930-0194, Toyama, Japan, moaddeli@ms.toyama-mpu.ac.jp.
authors: Ali
authors: A
authors: Nasermoaddeli
authors: Michikazu
authors: M
authors: Sekine
authors: Sadanobu
authors: S
authors: Kagamimori