Why the Vagus nerve matters for better sleep, less stress and more calm

by Erica Twingler

Why your vagus nerve matters in your sleep routine

Stress can have a big impact on sleep. Even when the body is showing signs of fatigue, the brain can still be racing through all the things that need to get done. A large part of promoting better sleep is looking after your vagus nerve, which plays an important role in supporting the body relax and manage stress.

What is the vagus nerve?

The vagus nerve is the longest nerve of your parasympathetic nervous system, the “rest and digest” part of your nervous system. It runs from the brainstem down through your neck, heart, lungs and gut, constantly sending messages between your body and brain.

When the vagus nerve is stimulated, this is what happens:

Your heart rate slows
Your breathing deepens
Digestion is stimulated
Your body gets the signal that it’s safe to slow down

How do you know if your stress response is affecting your sleep?

You might notice that you:

Feel tired all day, then get a boost of energy at around 10pm
Fall asleep easily but then wake up during the night
Wake up unrefreshed even after a full night of sleeping
Feel tense in your jaw, shoulders or stomach at bedtime
Struggle to switch off, even when you’re exhausted

Why the vagus nerve matters for sleep

Sleep isn’t something you force. It’s something your body allows when it feels safe. If your nervous system is stuck in “fight or flight”, with high cortisol and a racing heart, falling asleep, staying asleep and waking up rested becomes difficult.

Stimulating your vagus nerve daily means you have a nervous system that can shift easily from stress back to calm. This state is linked with:

Falling asleep more easily, as your heart rate and breathing slow down
Deeper, more restorative sleep, because your body isn’t on high alert
Fewer nighttime wake-ups, often tied to cortisol and blood sugar swings
A healthier stress response during the day, so you’re not carrying tension into bed

The gut connection

The vagus nerve is the main communication line of the gut-brain axis, and most of its signal’s travel from your gut to your brain. When digestion is sluggish, inflamed or unsettled, your brain knows about it, and that can show up as fatigue and broken sleep.

How to support your vagus nerve for better sleep

You can start with one or two:

Lengthen your exhale. Breathe in for 4, out for 8. A longer exhale is one of the simplest ways to shift your body into parasympathetic mode. Try five minutes in bed before falling asleep.
Hum or sing. The vagus nerve connects to the muscles at the back of your throat, so vibrating them may help stimulate it.
Expose yourself to morning light. Ten minutes of daylight early in the day helps set your body clock, which supports proper melatonin release in the evening.
Eat an earlier dinner. Finishing your last meal two to three hours before bed gives your body time to digest, so it isn’t working on digestion while trying to rest.
Decrease your caffeine and alcohol intake. Both can disrupt sleep quality and keep your nervous system switched on. Have your last cup of caffeine early (before 2pm).
Create a wind-down ritual. Lower your light brightness, put your phone away, and try gentle stretching, legs up the wall, or a warm bath. Your body loves repetition (check out the evening routine below).
Connect. Make sure you laugh daily and surround yourself with good people. These help calm the nervous system more than you know.

A simple wind-down you can try tonight

Dim the lights and put your phone in another room
Do a few slow shoulder rolls and neck stretches
Lie down with your legs up the wall for 5 minutes
Breathe in for 4, out for 8, do this at least 1 minute, gradually increase
Have a warm herbal tea such as chamomile, lavender or lemon balm

Here is a quick list for you to activate the vagus nerve

Spending time in nature
Meditation
Yoga
Sound bowl healing
Deep breathing exercises
Being around loved ones
Singing or humming
Listening to music
Dancing
Journaling
Exercise
Cold exposure

What you eat matters too

Nutrients are essential for optimal nervous system function. Lacking a few can impact your sleep and overall nervous system which is why having a balanced diet is essential for our overall health.

Foods that support a calmer nervous system:

Magnesium (aim for around 270mg a day)