Does Headstand Increase Blood Flow To Your Brain?

June 16, 2020
Does Headstand Increase Blood Flow To Your Brain?

How does headstand affect cerebral blood flow?

Research Study At A Glance

Research Study At A Glance

The Research Question Asked

Does headstand increase blood flow to the brain?

Type of Study

Clinical research study

Study Participants (Sample)

Sample size: 5 men and 15 women

  • 20 total participants
  • Between ages 10-59
  • At least one year of yoga experience
  • Capable of and familiar with doing headstand

Methods

The researchers compared blood flow to the internal carotid artery when participants were lying down in a supine position with blood flow at the same location when participants were holding a headstand.

Results

  • Headstand did not increase blood flow in the internal carotid artery for otherwise healthy participants.

Conclusion

The body continues to autoregulate blood flow to maintain it within certain healthy values even if we are in headstand.

Signup for our newsletter!

Get the latest articles in your inbox each month.

"*" indicates required fields

Background

There are many beliefs that surround the various yoga practices with respect to what the impacts of the practices are physiologically. Some of these beliefs arise from an interpretation of classical Sanskrit texts which describe the practices. Other beliefs don’t seem to arise from a particular source, but we still often hear them repeated in the yoga community. Slowly, in recent years, the research community has taken a closer look at some of these beliefs to see whether they can validate the claim of a particular effect of a yoga practice or posture in a laboratory setting. In the current study that I summarize here, the research team examined the idea that doing headstand (sirsasana) increases blood flow to the brain.

Research question

Does headstand increase blood flow to the brain?

Research methods

The study included 20 total participants, five men and 15 women, who were all capable of and familiar with doing a headstand independently. All participants except one had at least one year of yoga experience. They ranged in age from 10-59; median age was 43. Of the study participants, 17 were evaluated at an altitude of 2000 m and the rest were evaluated at sea level.

The researchers measured blood flow using an ultrasound examination of the internal carotid artery. Blood flow was measured when participants were lying on their back in a supine position, then in headstand, and then again in a supine position.

Results

  • 17 of 20 participants did not experience increased blood flow in the internal carotid artery during headstand
  • 3 of 20 participants did experience increased cerebral blood flow in the internal carotid artery during headstand and these participants were found to have increased intraocular pressure during headstand as well

Why is this relevant to yoga practitioners?

Headstand is a posture common to most styles of yoga asana. And, questions often come up from practitioners about what happens physiologically when we go upside down. In this research, the authors verified that autoregulation of cerebral blood flow, the body’s method of maintaining blood flow to the brain within certain healthy values, continues as normal when we are upside down in headstand, as long as we are otherwise healthy.

Questions also come up around various aspects of headstand’s safety. What’s also relevant to yoga practitioners in this research is that the authors reported a small percentage of their participants actually did experience an increase in blood flow through the internal carotid artery when doing headstand. These same participants also experienced increased intraocular pressure. And that is commonly considered a contraindication for doing headstand. The researchers suggested that, in the case of these three participants, their body’s autoregulation system of blood flow was not functioning properly. They suggested that any dysfunction in that system should also be considered a contraindication for doing headstand and other inverted postures.

Check out our online courses and workshops

Conclusion

Research suggests that in otherwise healthy practitioners, our body is able to autoregulate our blood flow even when we are upside down. If however, we experience any dysfunction with that system, we should avoid inverted postures such as headstand. And we should consult with our doctor or appropriate medical professional.

Reference citation

Minvaleev, R.S., R.R. Bogdanov, D.P. Bahner, A.B. Levitov. 2019. Headstand (sirshasana) does not increase the blood flow to the brain. The Journal of Alternative and Complementary Medicine. 25(8):827-832.