Can Better Breathing Improve Sleep?
How your breathing habits may be influencing the quality of your sleep—and what current research tells us.
We spend around one-third of our lives asleep, yet many people wake feeling anything but refreshed.
Poor sleep is often blamed on stress, busy schedules or too much screen time. While these factors certainly matter, one area that's frequently overlooked is how we breathe.
Breathing continues throughout the night, influencing oxygen and carbon dioxide levels, nervous system activity and sleep quality. For some people, improving breathing habits may help support better sleep—but the relationship is more complex than simply taking a few deep breaths before bed.
Let's explore what the science tells us.
Why Sleep and Breathing Are Closely Connected
Breathing doesn't switch off when we fall asleep.
In fact, during sleep our breathing becomes almost entirely automatic, regulated by centres in the brainstem responding primarily to carbon dioxide (CO₂) and oxygen levels.
Healthy breathing helps support:
Efficient oxygen delivery throughout the body
Appropriate carbon dioxide regulation
Nervous system balance
Stable sleep architecture
Recovery and restoration
When breathing becomes disrupted, sleep quality can also be affected.
How Dysfunctional Breathing May Affect Sleep
Dysfunctional breathing refers to breathing patterns that are inefficient or poorly adapted to the body's needs.
Common examples include:
Habitual mouth breathing
Rapid or upper chest breathing
Chronic over-breathing (hyperventilation)
Frequent sighing
Irregular breathing patterns
These patterns may contribute to symptoms such as:
Difficulty falling asleep
Frequent waking
Feeling unrefreshed in the morning
Dry mouth upon waking
Morning headaches
Snoring
Daytime fatigue
It's important to note that these symptoms can also have many other causes. Persistent sleep problems should always be assessed by an appropriately qualified healthcare professional.
The Role of the Nervous System
One reason breathing may influence sleep is through its interaction with the autonomic nervous system.
The autonomic nervous system helps regulate many unconscious processes including heart rate, blood pressure, digestion and breathing.
Slow, comfortable breathing—particularly when the exhalation is gently prolonged—may increase parasympathetic nervous system activity, often referred to as the body's "rest and digest" response.
Research suggests that slow breathing practices can support relaxation and reduce perceived stress in some individuals, potentially making it easier to transition into sleep.
However, breathing exercises should not be viewed as a cure for insomnia, and not every technique is suitable for every person.
Why Nasal Breathing Matters During Sleep
One area receiving increasing research attention is nasal breathing.
The nose is designed for breathing.
Compared with mouth breathing, nasal breathing helps:
Warm and humidify incoming air
Filter airborne particles
Increase nitric oxide production within the nasal passages
Support efficient airflow
Promote more stable breathing patterns
Habitual mouth breathing during sleep has been associated with snoring, dry mouth and, in some cases, sleep-disordered breathing.
If nasal obstruction is present due to allergies, structural changes or illness, addressing the underlying cause is important rather than simply attempting to force nasal breathing.
Carbon Dioxide: An Often Overlooked Part of the Puzzle
Many people assume breathing is simply about getting more oxygen.
In reality, carbon dioxide plays an essential role in normal breathing physiology.
Healthy CO₂ levels help:
Regulate breathing drive
Support oxygen release from haemoglobin to body tissues (known as the Bohr effect)
Maintain acid-base balance
People who habitually over-breathe may reduce carbon dioxide levels below what's optimal for efficient oxygen delivery.
Functional breathing education often focuses on helping people develop quieter, slower and more efficient breathing patterns rather than simply breathing more deeply.
What Does the Research Say?
Research suggests breathing interventions may improve certain aspects of sleep in some populations.
Studies have reported improvements in:
Subjective sleep quality
Sleep onset (the time it takes to fall asleep)
Perceived stress
Heart rate variability
Anxiety symptoms
Many studies involve slow breathing exercises, yoga breathing (pranayama) or mindfulness-based breathing practices.
While the evidence is promising, it's important to recognise that breathing interventions vary considerably between studies, and more high-quality research is needed to determine which techniques are most effective for different sleep problems.
Breathing should therefore be viewed as one part of a broader approach to healthy sleep rather than a standalone solution.
Simple Breathing Strategies Before Bed
If you're looking to support relaxation before sleep, consider:
1. Breathe through your nose
Where comfortable and appropriate, aim for gentle nasal breathing.
2. Slow your breathing
Allow your breathing to gradually become slower and quieter without forcing it.
3. Extend your exhale
For some people, a slightly longer exhale may encourage relaxation.
For example:
Inhale for 4 seconds
Exhale for 6 seconds
The breath should remain comfortable rather than strained.
4. Reduce unnecessary effort
Many people unknowingly breathe with excessive effort.
Gentle, relaxed breathing is often more effective than trying to take large "deep" breaths.
When to Seek Professional Advice
Breathing education may support better sleep for some people, but it isn't appropriate to assume breathing is the primary cause of every sleep concern.
If you experience:
Loud or persistent snoring
Witnessed pauses in breathing
Excessive daytime sleepiness
Morning headaches
Waking gasping for air
Ongoing insomnia
it's important to speak with your GP or an appropriately qualified healthcare professional, as further assessment for conditions such as obstructive sleep apnoea or other sleep disorders may be recommended.
How The Guided Breath Can Help
At The Guided Breath, I take an individualised, evidence-informed approach to breathing education.
Rather than applying the same breathing exercises to everyone, sessions begin with understanding your breathing patterns, health history and goals.
For people experiencing sleep difficulties, this may include exploring:
Breathing mechanics
Functional breathing habits
Nasal breathing
Nervous system regulation
Practical breathing strategies that can be integrated into a healthy bedtime routine
The goal isn't simply to help you sleep better for one night.
It's to help you better understand your breathing and develop practical skills that support your long-term health and wellbeing.
Key Takeaways
Breathing and sleep are closely connected through respiratory physiology and nervous system regulation.
Dysfunctional breathing patterns may contribute to poor sleep in some individuals.
Gentle nasal breathing and slower, more efficient breathing may support relaxation before bedtime.
Breathing education should complement—not replace—good sleep hygiene and appropriate medical care.
Persistent sleep problems should always be assessed by a qualified healthcare professional.
References
Jerath, R., Edry, J. W., Barnes, V. A., & Jerath, V. (2006). Physiology of long pranayamic breathing: Neural respiratory elements may provide a mechanism that explains how slow deep breathing shifts the autonomic nervous system. Medical Hypotheses, 67(3), 566–571.
Laborde, S., Allen, M. S., Borges, U., et al. (2022). Effects of slow-paced breathing on stress and the autonomic nervous system: A systematic review. Psychophysiology, 59(6), e13953.
Russo, M. A., Santarelli, D. M., & O'Rourke, D. (2017). The physiological effects of slow breathing in the healthy human. Breathe, 13(4), 298–309.
Nunes, D. M., Mota, R. M. S., de Pontes Neto, O. L., et al. (2008). Impaired sleep reduces quality of life in chronic mouth breathers. Brazilian Journal of Otorhinolaryngology, 74(2), 224–230.
American Academy of Sleep Medicine. (2023). Clinical practice guidance on evaluation and management of sleep disorders.
