Indeed, chronic fatigue in modern individuals is far too complex an issue to say it will improve with a little more sleep. If you are still tired despite sleeping enough and taking nutritional supplements, it may be a more important signal sent from deep within our body. Modern medicine views chronic fatigue as a complex hypofunction of multiple systems.
First and foremost is the function of mitochondria, the energy factories at the cellular level. When mitochondria, which play the role of converting the food we eat into energy (adenosine triphosphate), are damaged or experience decreased function due to stress, inflammation, toxins, and the like, cells cannot produce energy properly no matter how well you eat. Just as electricity cuts out when a power plant fails, our body falls into a state of systemic energy shortage. When energy is insufficient in the brain, brain fog occurs, and when it is deficient in the muscles, the whole body aches and feels heavy.
Next is dysfunction of the hypothalamic-pituitary-adrenal axis. It is an important system that regulates our body's stress response, but suffering from chronic stress can cause the HPA axis to become excessively activated and eventually burn out. This causes problems in the secretion of the stress hormone cortisol, which leads to symptoms closely associated with chronic fatigue, such as sleep disorders, decreased immunity, and mood swings. It is just like an overloaded electrical circuit eventually cutting off.
In addition, gut health and the immune system are deeply linked to chronic fatigue. When the balance of microorganisms in the gut is disrupted, such as in leaky gut syndrome, inflammatory substances spread throughout the entire body and cause chronic inflammation, which interferes with energy metabolism and overloads the immune system. Considering that more than 90% of serotonin, called the happiness hormone, is produced in the gut, one can see how directly gut health is tied to mental health and, further, to vitality.
Sleep quality is also crucial. It is not simply the duration of sleep; recovery must occur with a proper balance between slow-wave sleep and REM sleep. Smartphone use, irregular lifestyle habits, stress, and other factors disrupt this sleep architecture, leaving you unrefreshed despite sleeping and causing you to experience chronic fatigue.
All of these problems correspond to the depletion of essence, qi, and spirit described in Donguibogam. Essence can be compared to mitochondrial function and nutritional status, qi to the HPA axis, autonomic nervous system, and energy metabolism, and spirit to brain function, neurotransmitters, and sleep quality. Ultimately, chronic fatigue is a powerful message that our body has lost balance overall, so wisdom is needed to integrate the perspectives of Korean medicine and modern medicine to support the body's fundamental recovery.
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