The heart and lungs are the main internal organs. A healthy heart, with developed myocardium and large heart capacity, is generally a good phenomenon, which can make the heart rest for a long time after beating and is not easy to get tired. You can reserve your physical strength for physical labor, and even if you are responsible for heavy physical labor, you will not feel uncomfortable such as palpitation and dizziness due to tachycardia.
Healthy lungs have larger vital capacity than the general population, better lung gas exchange, developed chest, strong respiratory muscles and slow and deep breathing. Breathing 10 times per minute can meet the body's demand for oxygen. This high-efficiency and labor-saving breathing method can prevent respiratory organs from overworking and respiratory diseases.
The traditional concept of health means that the body is in a normal state of operation and there is no disease, which is usually measured by anthropometry, physical examination and various physiological indicators.
In fact, health means that a person is in a good physical, mental and social state, including physical health, mental health, social health, intellectual health, moral health and environmental health.
The four cornerstones of keeping healthy are a balanced diet, moderate exercise, quitting smoking and alcohol and mental health. Some experts have come up with a formula for keeping in good health through research, which is = (emotional stability+moderate exercise+reasonable diet+scientific rest).
As follows:
A healthy person is well developed, tall, well proportioned, muscular and strong in limbs. Two people of the same age, if this person's height, weight, chest circumference, poor breathing, vital capacity, grip strength and jumping ability are higher than that person, it means that this person is healthier than that person.
People's labor, sports and various movements in daily life are all different forms of muscle movements dominated by the nervous system. The differences in strength, speed, endurance, agility and flexibility of muscles can reflect the functions of human nervous system and internal organs. So it is also an important sign of health. Healthy people have big muscles and great strength, which can account for 40-50% of their body weight.