While the term wilting pattern in Donguibogam might sound unfamiliar, modern medicine also explains leg weakness through various causes. Neurologically, when nerve signals traveling to the legs weaken or the function of the muscles declines due to peripheral neuropathy, myopathy, or spinal stenosis, the legs may give way, much like an interrupted electrical current. Endocrinologically, nerve damage caused by blood glucose control issues such as diabetic neuropathy, or thyroid gland dysfunction affecting muscle metabolism can also cause leg weakness. Nutritionally, deficiencies in elements essential for muscle function, such as vitamin B complex, vitamin D, and magnesium, can induce weakness. Blood circulation problems are another factor. If sufficient oxygen and nutrients cannot reach the legs due to vascular disease like lower extremity arterial occlusion, muscles cannot function properly. This aligns closely with the fluid deficiency described in Donguibogam, as blood is one of our body's vital body fluids. Looking specifically at the taeyangin constitution through Sasang constitutional medicine, every individual possesses a distinct physiological profile. The taeyangin is characterized by large lung and small liver, meaning strong lung function and relatively weak liver function. Energy tends to surge upward, leading to feelings of heat rising toward the head or a sense of chest stuffiness, while the lower body remains relatively weak. From a modern viewpoint, the taeyangin has a tendency toward sympathetic hyperactivity of the autonomic nervous system, consuming significant energy and becoming vulnerable to stress, which easily depletes body fluids. These constitutional characteristics, combined with chronic fatigue, sleep deprivation, excessive mental work, and irregular eating habits, can lead to muscle weakness or neurological hypofunction. There is also a modern view that lower extremity weakness in taeyangin can worsen when lower body circulation is poor or when low urine volume slows the clearance of metabolic waste. Just as Donguibogam warned against damp-heat accumulating in the body, a taeyangin must take special care to prevent internal heat and waste products from building up. Rather than attributing weak legs solely to aging or lack of exercise, understanding constitutional traits and bodily signals is essential. A balanced approach combining medical evaluation with constitutional care helps restore strength.
