Applied Psychophysiology and Biofeedback

, Volume 39, Issue 3–4, pp 171–180 | Cite as

Inhalation/Exhalation Ratio Modulates the Effect of Slow Breathing on Heart Rate Variability and Relaxation

  • Ilse Van Diest
  • Karen Verstappen
  • André E. Aubert
  • Devy Widjaja
  • Debora Vansteenwegen
  • Elke Vlemincx
Article

Abstract

Slow breathing is widely applied to improve symptoms of hyperarousal, but it is unknown whether its beneficial effects relate to the reduction in respiration rate per se, or, to a lower inhalation/exhalation (i/e) ratio. The present study examined the effects of four ventilatory patterns on heart rate variability and self-reported dimensions of relaxation. Thirty participants were instructed to breathe at 6 or 12 breaths/min, and with an i/e ratio of 0.42 or 2.33. Participants reported increased relaxation, stress reduction, mindfulness and positive energy when breathing with the low compared to the high i/e ratio. A lower compared to a higher respiration rate was associated only with an increased score on positive energy. A low i/e ratio was also associated with more power in the high frequency component of heart rate variability, but only for the slow breathing pattern. Our results show that i/e ratio is an important modulator for the autonomic and subjective effects of instructed ventilatory patterns.

Keywords

Relaxation Breathing Respiration Heart rate variability RSA 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Ilse Van Diest
    • 1
  • Karen Verstappen
    • 1
  • André E. Aubert
    • 2
  • Devy Widjaja
    • 3
    • 4
  • Debora Vansteenwegen
    • 1
  • Elke Vlemincx
    • 1
  1. 1.Faculty of Psychology and Educational ScienceKULeuvenLeuvenBelgium
  2. 2.Department of CardiologyKULeuvenLeuvenBelgium
  3. 3.Department of Electrical Engineering (ESAT) – STADIUSKU LeuvenLeuvenBelgium
  4. 4.Future Health DepartmentiMindsLeuvenBelgium

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