Vagus Nerve, Activated
Social media hype has made many suddenly aware of the vagus nerve for the first time ever. In fact, the vagus nerve isn’t just one nerve—it’s a network of nerve fibers running down each side of your neck. Its job? Well, let’s just start by saying it’s a multi-tasker. The vagus nerve helps your body maintain homeostasis, helping to control reflexive (autonomic) things like your heartbeat, breathing, digestion, and inflammation. It also plays a role in nervous system regulation, which is especially important for those of us who spend a lot of time in fight-or-flight. When your nervous system is good at switching between fight-or-flight and relaxation, that’s called high vagal tone… and it’s what we want. Because the opposite is associated with “chronic stress, higher levels of inflammation, and diseases such as heart failure and hypertension.”
While there are prescription vagus nerve stimulation (VNS) devices approved for the treatment of certain conditions, the OTC devices have little research to back them up. So, doctors recommend the following for stimulating your vagus nerve without spending your hard-earned cash on less-studied methods. And remember, consistency is key.
Exercise: A common misconception is that the vagus nerve is only stimulated when you’re relaxing or calm. In fact, exercise is one of the best ways to increase your vagal tone. People who exercise consistently will usually have a lower resting heart rate and higher heart rate variability (indicators of higher vagal tone).
Breathwork & Meditation: Deep-breathing exercises can affect some of the same markers as VNS devices. A 2025 research review showed increases in vagal tone and relaxation response activity, as well as reduced cortisol levels.
Cold exposure: Cold plunges are not as well-studied as the other options, but some smaller studies show cold exposure to the face specifically can increase vagal activity (probably due to the mammalian diving reflex).