Supplemental Oxygen Can Remedy both Low and High Carbon Dioxide Blood Levels to Improve Endurance
 
When a person is young, in their twenties with normal weight, the lungs are a certain size, and can manage oxygen in and carbon dioxide out properly for health.  But as people grow fat the lungs stayed the same size, creating a difficulty in getting a proper balance of oxygen and carbon dioxide in the body. 
 
Our physician colleague explained that fat manufactures carbon dioxide in the body, and breathe in, breathe out was not sufficient to create a proper balance of  oxygen and carbon dioxide in the body as our friend grew obese.  This white paper grew out of that experience.    
 
70% of the heart disease in the world is not adequately diagnosed, properly understood, or treated.  This is because the gold standard for heart diagnosis, the standard stress test, diagnoses heart blockages but not lack of oxygen.   Chronic fatigue, long term Covid are not diagnosed by any of the following standard hearth disease tests.   Invasive testing shows a difference in oxygneation of blood coming out of the lungs and oxygenation of blood going into the heart.
 
Current Heart Patient Initial Evaluation Testing that Does not SHow This Problem:
Extensive blood work
Pulmonary function testing
Echocardiography
Cardiac catheterization
Radiographic imaging
Nuclear imaging modalities
Cardiac stress testing
Cardiopulmonary exercise testing (CPET) noninvasive, not catheterization, just stress test exercise machine 
Source:  WinterGreen Research, Inc.  
 
Patients may undergo 20 or more tests as per the above list with no definitive diagnosis.  These tests do not show that under conditions of intense exercise the blood vessels and arteries between the heart and lungs may not properly oxygenate the organs, leading to fatigue during exercise.
 
Only the iCPET that uses a metabolic cart instead of a pulse oximeter is able to diagnose lach of oxygen transmission to the heart definitively.  The oxygen diagnosis from iCPET is definitive enough to get insurance reimbursement for chronic fatigue syndrome, while the other tests listed  above do not provide a definitive diagnosis and patients do not get disability insurance.