Lizb
Member
Good post.The reason for breathing less is to retain more CO2. That's Buteyko's aim. I'm not sure if will necessarily lower BMR. Because more CO2 ensures optimal tissue oxygenation. But the one thing breathing less would do is the possibility that there will be less alveolar exhange of gases - where CO2 is released and oxygen taken in by the blood. But how are we to know that the reduced breathing rate is not enough to provide the oxygen needed for respiration? If you're at the 40-45 CP and you take your oxygen saturation values, you will see that your spO2 is high enough.
I slowly came to understand why Buteyko needs coaching to be done right. The exercises gradually increasing your control pause, as the control pause is a surrogate measure of how much CO2 the blood holds. The higher the control pause, the higher the CO2 content. We can hold our breath longer because the higher CO2 content allows more oxygen to be released to the tissues, keeping tissues well supplied with oxygen. At the same time, higher CO2 content likely puts our blood pH closer to the optimal value of 7.4. As we hold our breath longer, this pH will get more acidic (from the products of metabolism) and as this pH moves toward 7.35, the urge to breathe gets stronger until we let go. The closer to optimal our blood pH is, the longer we can hold our breath.
So, I think we can remove lack of oxygen supply as a cause for the putative hypothyroidism from practicing Buteyko.
I'll have to backread some more.
p.s. I didn't explain why coaching is needed,
With each Buteyko session, we force our blood to increase the CO2 content. CO2 increases acidity and we can't increase acidity too much beyond where it pH goes lower than 7.35. Some people may in their fervor overdo their Buteyko (the false logic of more of a good is even better). Some people take maintenance drugs (which already disturbs the electrolyte balance), or have really acidic blood, that this may cause great harm. It may disturb the way the heart muscle contracts and relaxes, and lead to an emergency situation.
I've been trying to Buteyko for four years with instruction. I make progress and fall back. I eventually stopped as I just couldn't maintain the difficulty. I'm now in a really low cp level with a serious lung condition. Very worried.