Get your Health question answered in 3 easy steps
A Doctor will be with you shortly
Ask a Doctor Now
181 Doctors are Online

I get very lightheaded doing deep breathing during an exercise

User rating for this question
Very Good
Answered by

Practicing since : 2001
Answered : 1592 Questions
I get very lightheaded doing deep breathing during an exercise class. Why?
Tue, 6 Feb 2018 in Hypertension and Heart Disease
Answered by Dr. Ilir Sharka 1 hour later
Brief Answer:
A transient decrease in cerebral blood flow may be the cause.

Detailed Answer:

Welcome on HCM!

Regarding your concern, I would explain that deep breathing (triggered by muscle receptor during physical exercising) may lead to respiratory alkalosis, which is a condition where increased amount of carbon dioxide are expelled from the body.

Coming to this point, the subsequent PaCO2 (partial pressure of CO2 in the circulating blood) may lead to cerebral vasoconstriction, a reduced cerebral blood flow and neurologic symptoms like dizziness, confusion, lightheadedness, and sometimes even transient loss of conscience.

If such circumstances are frequent, then it is advisable to engage yourself in less strenuous exertion; health benefits are the same even when performing a simple aerobics, dancing, walking, etc.

From the other side, I would recommend checking your blood pressure values during exertion to clarify whether large fluctuations occur.

An exercise cardiopulmonary stress test would help to definitely respond the above alternatives before performing further strenuous exercise.

Hope to have been helpful to you!

In case of any further questions, feel free to ask me again.

Kind regards,

Dr. Iliri
Above answer was peer-reviewed by
Share on Facebook
Share on Twitter
Share on Google+

The user accepted the expert's answer

Ask a Cardiologist

© Ebix, Inc. All Rights Reserved.
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions
Already Rated.
Your rating:

Ask a Doctor