Vasodilation: What Is It, And Why Is It Important?

If you read, or have read, my previous posts, you will get a picture of how breathing is so much more than air going in and out of your lungs. As a key bodily function that can impact our quality of life, surprisingly, we are taught little about breathing and manipulating it for our benefit.

Vasodilation is an example of how breathing alters how our body functions. “Vaso” refers to the vascular system—the network of arteries, veins, and capillaries that transport blood around our body. “Dilation” means to make wider. Put simply, vasodilation occurs when blood vessels widen, which happens when the smooth muscles lining our blood vessels relax.

But how does our breathing cause vasodilation? There are several ways.

First, we can use our breath to control the level of carbon dioxide (CO2), a vasodilator, in our blood. Specifically, an increase in CO2 in the blood makes our blood more acidic, meaning our blood's pH level drops. The smooth muscles in our blood vessels are highly sensitive to changes in the pH of our blood. As the pH level drops, it causes a chemical reaction that inhibits calcium entry into the smooth muscles. This reduces the contraction of the smooth muscles. CO2 can also affect the electrical charge of smooth muscle, making it more negative. This means the cells are less likely to contract. The result? The blood vessels dilate.

Second, breathing through the nose increases the production of nitric oxide (NO). NO, like CO2, is a vasodilator. NO diffuses into the smooth muscle wall of the blood vessels leading to the activation of a protein that triggers:

• reduced calcium absorption

• cellular electrical charge becomes more negative

• muscle contraction is reduced.

• The outcome is increased vasodilation.

Third, slow, light, deep breathing activates the parasympathetic nervous system—rest and digest. In this calm state, blood vessels naturally dialate and are more responsive to the effects of CO2 and NO.

Why does any of this matter?

The obvious benefit of vasodilation is increased blood flow to all the cells in the body. More glucose and oxygen are reaching the cells. This can improve brain function when working on cognitive tasks or muscle performance during exercise.

Other benefits of vasodilation include:

• Lower blood pressure

• Improved thermal regulation

• Better circulation for cold hands and feet

• Easier breathing and better oxygen exchange in the lungs

We can influence vasodilation with breathing, and the results can be breathtaking. Boosted energy, more focus, and being calm are just a few breaths away.

Disclaimer

This blog is for informational purposes only. It is not medical advice. Always consult a healthcare professional for personalized guidance and treatment.