brain blood flow

,

Brain Blood Flow, Humming Bee Breathing, and an Unhurried Life

,

Reading Time: 1 min 58 sec

I hope the next 24’ish breaths are the most nourishing of your day.

4 THOUGHTS

1. Breathing 101: How Breathing Affects Brain Blood Flow

1. CO₂ crosses the blood-brain barrier and reacts with water in the CSF to form H⁺ and bicarbonate.

2. The increased H⁺ lowers pH which, through a cascade of cellular and molecular pathways, relaxes the blood vessels.

3. This increases brain blood flow to ensure adequate oxygen delivery to the brain. The reverse is true for low CO₂.

Thus, when we overbreathe, we lower CO₂ and reduce brain blood flow; when we breathe light and slow, the opposite happens, and we increase brain blood flow.

2. Testing Progress on the Spiritual Path

“One of the ways to test our progress on the spiritual path is to see how much we are able to free ourselves from the oppressive pressure of time. The clock is the most eloquent symbol of the tyranny of time.”

– Eknath Easwaran, The Bhagavad Gita for Daily Living

This one felt like a spiritual slap in the face 😬 because, despite all my practice, I still catch myself rushing through the day, ruled by the microwave clock. The subtle shift Easwaran is pointing to is not that we escape time, but rather that we free ourselves from the pressure of time. To move with ease, no matter how busy we are. That’s progress.

3. The Science-Backed Benefits of Humming Bee Breathing

“The findings indicated that bhramari pranayama has a positive impact on psychological, cardiovascular and pulmonary health…It is…associated with lower levels of stress, anxiety, depression, sympathetic activity and blood pressure, and higher levels of attention, quality of sleep, parasympathetic activity, vagal activity and pulmonary functioning.

- Chetry et al. (2024)

That’s an impressive list. And while I’ve shared this study before, I recently put together a simple post that sums it up. I thought you might enjoy revisiting it like I did. Click here to check it out.

4. Some Great Advice for the Week

“So look for those little ways in the flow of life to feel a bit more relaxed, protected, strong, and at ease…and a little more grateful, glad, and successful…and a little more cared about and caring, and a little more loved and loving…The more often and deeply you do this, the greater the results.”

- Rick Hanson, Ph.D., Neurodharma

1 Quote

“A simple, unhurried life can be full of wisdom and beauty.””
— Eknath Easwaran

1 GOOD BOOK

The Well-Lived Life by Gladys McGarey, MD

I’ve been raving about this book for over a year now—it’s one of my all-time favorites. I’ve received more messages from readers that this book changed their life than any other I’ve shared. Dr. McGarey was 102 when she wrote it, and you can truly feel her wisdom in every sentence. (She has since passed away, back in September, at the age of 103.) I can’t recommend this one enough.

In good breath,

Nick Heath, T1D, PhD
“Breathing is the compound interest of health & wellness.”

Enjoy these posts? Donate to say thanks!



P.S. a modern-day Descartes




SKY Recovery Program

My dear friend Colleen Loehr, MD, is co-teaching an online course for the SKY Recovery Program from June 7th to 9th. The course is open to anyone—people in recovery and people who have a friend or loved one with an addiction problem. The fee is only $95, so it’s an inexpensive way to learn the SKY technique for recovery and addiction. Click here to learn more about it. 🙏


The Breathing App for Diabetes

This is the first program specifically made for people with diabetes to help manage their stress through breathing and mindfulness practices. In addition to the amazing program inside the app, we have some really neat things coming up, so sign up now!

Learn more here.



Amazon Associate Disclosure

I’ve been recommending books for almost 6 years. Yet somehow, I just discovered that I could be an Amazon affiliate [face-palm]. In any case better late than never. Now, any Amazon link you click is an affiliate link. As an Amazon Associate, I earn from qualifying purchases. So, if you’d like to support my work, buying books through these links is helpful : )

* An asterisk by a quote indicates that I listened to this book on Audible. Therefore, the quotation might not be correct, but is my best attempt at reproducing the punctuation based on the narrator’s pace, tone, and pauses.

 

Only Breathing Principles Endure

An-Action-New.png

The first time I heard that quote, I thought of Wim Hof. Although Wim’s charisma is what sets his method apart from others, the principles he teaches are timeless.

For example, in the classic book Science of Breath, the following advice is given to avoid catching a cold:

When chilled, breathe vigorously for a few minutes, and you will feel a glow all over your body. [1]

How about the Oxygen Advantage? Well, that originated with the Buteyko Method. And long before Buteyko, yogis were training themselves to “bottle up” as much CO2 as possible (my bold).

He had learned much about the basics of the transparent gas in medical school and quickly realized that yogic rituals worked to bottle it [CO2] up inside the body. The main technique of manipulation was pranayama… [2]

It is often said that history repeats itself. Breathing techniques are no exception. People relearn the same principles and add their own unique take on it. But the the principles remain.

That’s why for health and wellness, I focus on principles, not techniques. And from thousands of years of practice, and hundreds of years of research, the key principles are:

  1. Breathe Through Your Nose (24/7) - Unless you’re an elite athlete, you should be breathing through your nose all the time. This is especially true during sleep.

  2. Breathe Slowly - Almost every technique (and scientific study) has focused on breathing slowly, usually in the range of 4-6 breaths/min. Use any method you’d like to achieve this rate (equal inhale/exhale, extended exhale, box breathing, etc.).

  3. Hold Your Breath - Breath holds have amazing benefits, doing everything from improving immune function to increasing blood flow to the brain.

I’ve jumped on almost every breathing bandwagon there is. And every time, I discover that there is no “cure all.” There are only principles. And when they are practiced with patience, persistence, and diligence, the true magic begins.

In good breath,
Nick

[1] Science of Breath

[2] The Science of Yoga

Increase brain blood flow by 20%

Hi everyone,

Over the last month, we’ve learned several important aspects of intermittent hypoxia (IH). For example, IH increases immune function and the production and storage of nitric oxide.

Although we’ve only scratched the surface on IH, I want to wrap up the discussion (for now) with one of my favorites benefits: Increased brain blood flow.

Intermittent hypoxia increases brain blood flow by 20%

(Published in 2017 in Hypoxia. To read the full summary, Click Here)

The participants in this study inhaled air with 10% oxygen for 6 min to induce hypoxia. Then, they breathed normal room air for 4 min. This cycle was repeated 5 times.

Measurements were recorded during the first and fifth bouts of hypoxia:

They found that intermittent hypoxia increased brain blood flow by 20%(!)

Fractional oxygen extraction in the brain also increased significantly. Pretty remarkable.

How to use these findings in your life

Statistical analysis revealed that major increases in brain blood flow occurred when blood oxygen saturation dropped to ~86%.  We can achieve this (with practice) using breath holds. 

I recommend performing 3-5 breath holds, with a 1-min recovery between each one, approximately 10-30 minutes before a workout, competition, or presentation. The increased brain blood flow will help focus your mind and prepare you for what’s ahead.

In good breath,
Nick

P.S. Breath holds can be dangerous. Take a look at Principle 3 before getting started.

P.P.S. The ~86% finding won’t be universal. Sometimes I barely drop my O2 below 95% and still feel major enhancements in my focus and concentration. In my experience, simply performing a few cycles of mild-to-moderate breath holds is all that is needed to feel the benefits.