In the field of healthcare, oxygen is the fundamental element for maintaining physical health. It is like an invisible bond that closely connects various physiological functions of the human body. The human immune system is like a carefully constructed defense fortress, and sufficient oxygen is the indestructible cornerstone of this fortress. When delving into the microscopic level, immune cells such as macrophages, T lymphocytes, and B lymphocytes can have their activities and functions significantly enhanced in an oxygen – rich environment. Macrophages, known as the “scavengers” of the immune system, with the assistance of sufficient oxygen, can more acutely identify and rapidly engulf invading bacteria, viruses, and other pathogens, just like lighting a bright lamp in the dark, leaving the enemies with no place to hide. T lymphocytes and B lymphocytes are like well – trained elite troops. Nourished by oxygen, they can more efficiently initiate the immune response, produce antibodies or killer cells, thus greatly enhancing the body’s resistance and enabling us to better defend against external pathogens.

For people who are in a high – pressure work environment or a fast – paced lifestyle for a long time, the body is like a precision machine operating at a continuous high speed and is extremely prone to fatigue. In modern society, office workers often face long – term overtime and high – intensity work tasks. In such a state, the body undergoes anaerobic metabolism and produces a large amount of metabolites such as lactic acid. These metabolites are like the debris accumulated inside the machine, piling up in the muscles and blood, leading to an increase in fatigue. Regular oxygen inhalation is like injecting high – quality lubricating oil into this machine, which can effectively relieve physical fatigue. Research shows that after working continuously for 4 hours and then inhaling oxygen for 20 minutes, the average fatigue of the subjects is reduced by 30%. The underlying principle is that oxygen inhalation can accelerate the oxidative decomposition of metabolites such as lactic acid, converting them into carbon dioxide and water for excretion, while providing sufficient energy for cells to maintain their normal functions. In addition, oxygen inhalation can regulate the excitability of the nervous system and improve sleep quality. When body cells carry out efficient metabolic activities under the nourishment of sufficient oxygen and promptly excrete metabolites such as lactic acid and urea from the body, the body can always maintain a good state. For example, some programmers who are in high – intensity work for a long time, after inhaling oxygen during work breaks, not only improve their work efficiency but also significantly improve their sleep quality at night.