Lots of people think it is healthy as long as if only not getting sick, some people think it is healthy when every part of the body function runs normally. There is a joke, “Eating up and spending lots of money is healthy.” Dictionary states “physiological function of every tissue and organ is normal and not ill”. The above statements sound reasonable, but may not be 100% correct.

Sub-health is defined by the World Health Organization as a state between health and disease when all necessary physical and chemical indexes are tested negative by medical equipment, things seem normal but the person experiences all kinds of discomfiture and even pain. 
The main symptoms of sub-health is body fatigue, difficulty in recovering after rest, body-ache, insomnia, lack of appetite, depression, anxiety, stress, fear, bad temper, palpitation, dizzy head and vision, and general lack of strength. The World Health Organization found that 10% of world adult population are in sub-health condition. If you feel this 10% is not a big deal, think again. The 10% is not shared evenly among the world population. Due to various reasons, some industrialized societies and some developing societies are the most seriously hit. Long term stress, overloaded physical or mental work, environmental pollution, unhealthy food habits, disordered timetable, all pose to push us into this condition. Actually, the sub-health condition is often found among the groups of people with high educational level who play key role in various fields.

Is sub-health detectable? Of course! By measuring bio-energy of 12 Meridians based on traditional Chinese medicine theory, your sub-health condition will be detected within a few minutes. 

Over 5,000 years ago, the ancient Chinese discovered a subtle energy in the body that can't be seen, felt or found with the senses. Energy disturbances in the subtle bodies precede the manifestation of abnormal patterns of cellular organization and growth = ill health. Matter and energy are two different manifestations of the same primary energetic substance of which everything in the universe is composed, including our physical and subtle bodies. Matter, which vibrates at a very slow frequency, is referred to as physical matter. That which vibrates at speeds exceeding light velocity is known as subtle matter. Subtle matter is as real as dense matter; its vibratory rate is simply faster. It is believed that two opposite ends of the spectrum--yin, the energy of earth and yang, and the energy of heaven--combined with humans to create this vital force.

Energy is the source of all movement in the body. In a healthy person, living in harmony with him- or herself, others and the environment, it circulates freely. A disturbance of this cyclical flow of energy results in disharmony leading to sickness and disease. Any part or organ in our body with deficient energy supply cannot function properly. Lack of energy in the Bladder Meridian for example results in a weak back and consequently backache.