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Why just only 70-80 years ago, as this graph (based on 24 medical studies) testifies, breathing of ordinary people (so called "normal subjects") was very different from breathing of modern people? Modern people breathe about 2 times more air. (Click on the graph to read all 24 references.)
Western physiological norms for breathing were established about 100 years ago.
Typical CO2 concentrations in the lungs and arterial blood were
about 5.5-6%, with a lung ventilation of about 4-6 l/min. The usual CPs
(oxygenation) of
ordinary people were in a range from 40 to 50 s. The CPs of
people nowadays are about 20-25 s. We breathe more air and have lower CO2
concentrations and less oxygen in tissues and brains. We also have less oxygen
in other vital organs. Why? Modern
civilization has brought about some negative changes affecting our breathing and health.
Among them are:
Physical exercise
Mouth breathing
Sleep factors
Psychological stress
Overeating
Overheating
Lack of nutrients
Toxins and pollution
Poor posture
Talkativeness
Factor for infants
Other factors
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The HV-promoting factors are individual to the person and can vary over time for the same person. For example, a healthy young man, after graduation, may become less active physically. Breathing gets heavier. After some years ... Read more .... |
People in the past. Do old movies and films show that people's breathing
pattern in the past was different? 1. People kept their mouths shut. 2. People
spent hours while reading, speaking, and working in the correct posture...
Read more ... |
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How is it possible that a human being, one of the smartest species on Earth, can kill itself, and over 90% people die this way, by over-breathing? Is it nature so silly to create this way? In order to answer these questions we need to consider changes in air composition on Earth. ... |
Since this primitive air had
very little O2, our evolutionary predecessors could get more oxygen in tissues
only by breathing more. Could it be so that this was the reason why
hyperventilation became the main reflex or drive
of the human organism? ... |