Homepage: Norms, rates, CP and body oxygenation
How to measure CP, breathing, and body oxygenation (DIY)
“Oxygen content in the organism can be found using a simple method: after exhalation, observe, how long the person can pause their breath without stress.” Dr. K. P. Buteyko, "Dr. Buteyko lecture in the Moscow State University on 9 December 1969"
Click on the picture to watch the introductory video clip where I explain in detail how the stress-free breath holding time test is done and what the typical CP numbers are. Video clip "Stress-free breath holding time test" (it will open in a new window).
There are two important factors for the oxygenation index or stress-free breath holding time test: first, it is done after your usual exhalation (outhale); second, the test it is done only until the first signs of stress or discomfort. The first factor excludes differences in our lungs' capacity. Influences of previous training and will power are eliminated by the second factor. Pinching the nose is also important for accurate results since we continue to breathe unconsciously (about 10% of our usual breathing) if the nose is not pinched. Here is the complete instruction.
How the CP test is done
Sit down and rest for 5-7 minutes. Completely relax all your muscles, including
the breathing muscles. This relaxation produces natural spontaneous exhalation
(breathing out). Pinch your nose closed at the end of this exhalation and count
your BHT (breath holding time) in seconds. Keep nose pinched until you
experience the first desire to breathe. Practice shows that this first desire
appears together with an involuntary push of the diaphragm or swallowing
movement in the throat. (Your body warns you, “Enough!”) If you release the nose
and start breathing at this time, you can resume your usual breathing pattern
(in the same way as you were breathing prior to the test).
Do not extend breath holding too long. You should not gasp for air or open your
mouth when you release your nose. The test should be easy and not cause you any
stress. The BHT test does not interfere with your breathing.
[Warning. Some, not all, people with heart disease, migraine headaches, and
panic attacks may experience negative symptoms minutes later after this light
version of the test. If this happens, they should avoid this test.]
Some western doctors call such a BHT test “a period of no respiratory
sensations” because when the time is voluntarily extended there is a stress that
increases with each further second of breath holding.
Look at the diagram above: after the test you can comfortably breathe as before the test. If you stop the test and resume breathing at your first desire to breathe, you will be able to breathe as before: no stress, an easy comfortable procedure.
If you hold the breath for too long, the first inhalations will be deeper, as shown here:
This video clip explains in detail how to do the test: http://ca.youtube.com/watch?v=P2OdshyS95M
What about usual CP numbers, CP norms
and CP of sick and healthy people?
“If a person breath-holds after a normal exhalation,
it takes about 40 seconds before breathing commences”
From the textbook “Essentials of exercise physiology”
McArdle W.D., Katch F.I., Katch V.L. (2-nd edition);
Lippincott, Williams and Wilkins, London 2000, p.252.
Doctor Buteyko and his medical colleagues tested hundred of thousands
patients and found that the following relationships generally hold true:
1-10 s - severely sick, critically and terminally ill patients, usually
hospitalized.
10-20 s - sick patients with numerous complaints and, often, on daily
medication.
20-40 s - people with poor health, but often without serious organic
problems.
40-60 s - good health.
Over 60 s - ideal health, when many modern diseases are virtually
impossible.
For the first time in the history of medicine, a group of doctors, after studying and curing thousands of patients, suggested the standard for ideal health that provide guarantee from such chronic conditions as cancer, heart disease, diabetes, COPD, arthritis, and many others.
How does this test relate to breathing?
The bigger your breathing, the smaller your oxygenation index. If we accept the international norm of 40 s and your time is 20 s, you breathe for 2 people. If you have 10 s of oxygen in the body, you breathe for 4 people.
"I said about measurements of breathing: the control pause is done for measurement of breathing. Not breathing retraining, but its measurement. It is started after exhalation. Breathing retraining is another business. The control pause does not train breathing, but measures it. This is not treatment, this is a measurement." Dr. K. P. Buteyko, "Dr. Buteyko lecture in the Moscow State University on 9 December 1969"