The Calm Anchor
This technique is your quick and simple anchor in everyday stress, for more calm and composure.
BeginnerInformation about this breathing technique
The Calm Anchor, also known as 4-7 breathing, is a simple breathing technique where you inhale for 4 seconds and then exhale for 7 seconds to calm your body and mind.
- 1.Sit or lie down in a comfortable position. Gently close your eyes if that feels good to you.
- 2.Breathe in slowly and calmly through your nose while counting to four internally.
- 3.Breathe out slowly and completely through your mouth or nose while counting to seven internally. Try to keep the exhalation gentle and controlled.
- 4.Repeat this cycle for one to three minutes, or for as long as it feels pleasant to you.
The key to this exercise lies in the extended exhalation. It stimulates the vagus nerve, the main nerve of the parasympathetic nervous system (also called the "rest nerve"). This lowers heart rate and blood pressure, relaxes the muscles and calms the mind. It is a highly effective way to shift from a state of stress or tension into one of composure.
4-7 breathing works physiologically via respiratory sinus arrhythmia and the baroreflex: slow breathing with extended exhalation increases parasympathetic (vagal) activity and heart rate variability, both associated with better stress regulation.
The extended exhalation in particular shifts the autonomic balance towards the parasympathetic system; studies show that longer exhalations are accompanied by an increase in vagal HRV markers and subjective relaxation.
Breathing close to the resonance frequency of around 0.1 Hz (roughly 6 breaths per minute) maximises HRV and baroreflex gain; 4 seconds inhale and 7 seconds exhale produce about 5.5 breaths per minute and therefore fall into this range.
Clinically, related protocols such as 4-7-8 breathing have been shown to reduce anxiety after bariatric surgery and to favourably influence HRV parameters and blood pressure, including in young adults.
Beyond autonomic effects, imaging and EEG studies during slow breathing show increased prefrontal activation and more alpha activity, which supports emotion regulation and calming.
Sources (APA):
Aktaş, G. K., & Eskici İlgin, V. (2023). The effect of deep breathing exercise and 4-7-8 breathing techniques applied to patients after bariatric surgery on anxiety and quality of life. Obesity Surgery, 33(3), 920–929. https://doi.org/10.1007/s11695-022-06405-1
Komori, T. (2018). The relaxation effect of prolonged expiratory breathing. Mental Illness, 10(1), 7669. https://doi.org/10.4081/mi.2018.7669
Lehrer, P. M., & Gevirtz, R. (2014). Heart rate variability biofeedback: How and why does it work? Frontiers in Psychology, 5, 756. https://doi.org/10.3389/fpsyg.2014.00756
Russo, M. A., Santarelli, D. M., & O'Rourke, D. (2017). The physiological effects of slow breathing in the healthy human. Breathe (Sheff), 13(4), 298–309. https://doi.org/10.1183/20734735.009817
Vierra, J., Boonla, O., & Prasertsri, P. (2022). Effects of sleep deprivation and 4-7-8 breathing control on heart rate variability, blood pressure, blood glucose and endothelial function in healthy young adults. Physiological Reports, 10(13), e15389. https://doi.org/10.14814/phy2.15389
Zaccaro, A., Piarulli, A., Laurino, M., Garbella, E., Menicucci, D., Neri, B., & Gemignani, A. (2018). How breath-control can change your life: A systematic review on psycho-physiological correlates of slow breathing. Frontiers in Human Neuroscience, 12, 353. https://doi.org/10.3389/fnhum.2018.00353
Birdee, G. S., et al. (2023). Slow breathing for reducing stress: The effect of extending exhalations. Integrative Medicine Research, 12(3), 100995. https://doi.org/10.1016/j.imr.2023.100995