Most people have unhealthy breathing habits. They hold their breath or breathe high in the chest or in a shallow, irregular manner. These patterns have been unconsciously adopted, accidentally formed, or emotionally impressed.
Certain “typical” breathing patterns actually trigger physiological and psychological stress and anxiety reactions. Babies know how to breathe and you can see their belly expand as the diaphragm moves down and their bellies swell. Adults breathe more through expanding their chest cavity and it takes training and discipline to return to more natural breathing patterns that allow for full oxygenation.
A lack of carbon dioxide is harmful though many climate hysterics are running around loudly proclaiming that we have too much and should put a tax on it. Carbon dioxide is as fundamental a component of living matter as is oxygen and if you do not agree, go ask plants! When people have bicarbonate deficiencies (acid conditions, which most people develop as they age), they have carbon dioxide deficiencies, which translate into oxygen deficiencies.
If a carbon dioxide deficiency continues for a long time, then it causes diseases, aging and cancer, because oxygen is not being delivered properly to tissues. Ancient forms of medicine knew that for increased vitality and freedom from disease good habits of breathing must be formed. They knew that poor breathing reduces our vitality and opens the door to disease.
The important thing is the relationship between gases – between carbon dioxide and oxygen. Too much oxygen (relative to the level of carbon dioxide) and we feel agitated and jumpy. Too much carbon dioxide (again, relative to the level of oxygen) and we feel sluggish and sleepy and tired.
A natural misconception most doctors maintain is that oxygen and carbon dioxide are antagonistic that a gain of one in the blood necessarily involves a corresponding loss of the other. This is not correct; although each tends to raise the pressure and thus promote the diffusion of the other, the two gases are held and transported in the blood by different means; the hemoglobin in the corpuscles carry oxygen, while carbon dioxide is combined with alkali in the plasma.
A sample of blood may be high in both gases, or low in both gases. Under clinical conditions, low oxygen and low carbon dioxide generally occur together. Therapeutic increase of carbon dioxide, by inhalation of this gas diluted in air, is often an effective means of improving the oxygenation of the blood and tissue.
Look at the profound healing effect of carbon dioxide. The following shows treatment effects of CO2 medicine for a diabetic foot. Carbon dioxide footbath therapy was developed as a means for healing diabetic foot and other ischemic ulcers. This healing was accomplished with sodium bicarbonate baths laced with some citric acid, which breaks down the bicarbonate into CO2 micro bubbles.
This is before, then one month and three months after treatment. The only other treatment that comes close to helping a diabetic foot like this is magnesium therapy, which combines beautifully in baths with bicarbonate and CO2 medicine therapies. Soaking in sodium bicarbonate baths with citric acid added turns the bicarbonate into micro bubbles of carbon dioxide.
We can see and compare the same type of treatment with oxygen and see the results are the same. The University of Tennessee Medical School shows what oxygen can do for wound healing. Every cell in our body has the ability to recognize and respond to changes in the availability of oxygen. The best example of this is when we climb to high altitudes where the air contains less oxygen. The cells recognize the decrease in oxygen via the bloodstream and are able to react, using the ‘hypoxic response’, to produce a protein called EPO (erythropoietin). This protein in turn stimulates the body to produce more red blood cells to absorb as much of the reduced levels of oxygen as possible. 
People who live at very high altitudes live significantly longer;
they have a lower incidence of cancer (Weinberg, et al., 1987)
and heart disease (Mortimer, et al., 1977), and other
degenerative conditions, than people who live near sea level
We can literally force mitochondria to become active again and use the Krebs cycle for energy if we ram enough oxygen into the cells. This process is facilitated when hydrogen is added.
If you put enough oxygen and hydrogen into a cancer cell it will turn on the Krebs cycle (the mitochondria) and this reignites the program for cell death. Remember carbon dioxide is the main product of the Krebs Cycle. So when carbon dioxide levels go up we increase our health. This is why exercise is so important. It is the very best way to create lots of CO2! CO2 coming off the mitochondria in great quantities is showing that our energy factories of life are fired up with all burners burning.
 CO2 footbath therapy; http://www.co2bath.com/top.htm
 University of Tennessee; Hyperbaric Oxygen; http://www.utcomchatt.org/subpage.php?pageId=838