Middle-aged people are the backbone of society and the pillar of family. People often use "prime of life" to summarize middle-aged people. What age group do middle-aged people refer to? The most common saying is "middle age is around 40 years old". 199 1 year, the world health organization reclassified the life period as: young people under 44 years old; 45 ~ 59 years old is middle age; 60 ~ 74 years old are young old people (or old people); 75 ~ 89 years old for the elderly; People who are over 90 years old live a long life. The middle-aged people we refer to here are people aged 45-59.
Middle age is the most precious, wonderful and eventful period in life. Most people used to think that the golden age of human brain use was between the ages of 20 and 29, and then it began to decline gradually. But recent research shows that 40 ~ 49 years old is the best period of life wisdom. The United States once tested the ability of people aged 20-70 to solve daily problems, and put forward that the order of wise periods in life is: 45-49 years old; 30 ~ 39 years old; 50 ~ 59 years old; 60 ~ 69 years old; There are signs of mental decline after 70 years old.
The research report pointed out that after middle age, people will soon move from strong to aging, and various organs of the whole body will begin to fibrosis, leading to gradual weakening and decline of function. At this time, the regenerative ability and immune function of human cells began to weaken gradually. The function of endocrine glands, especially gonads, is gradually declining. The ability of sensory organs gradually decreases with age. It can be said that all parts of the body and organs are gradually aging. Skin ages faster than other parts of the body, because it is attacked by wind, sun and cold and is often damaged. With the increase of age, the skin becomes thinner, elasticity gradually loses, subcutaneous fat decreases, and skin wrinkles gradually form, especially around the eyes and lips. Due to the decrease of vascular elasticity, blood pressure increases with age. Due to the decline of the strain capacity of the heart and lungs, it often leads to the inability to engage in manual labor like young people, the elasticity of the eyeball lens is gradually lost, the natural adjustment ability of the eyeball is gradually weakened, and the vision is reduced, which makes people feel blurred when reading or working at close range, resulting in presbyopia. The decrease of bladder reserve capacity leads to frequent urination and nocturia. The decline of brain power is mainly manifested in the recent and mechanical memory decline. Due to changes in metabolism and endocrine, abdominal and waist fat increased and began to "get fat". Middle-aged people may have coronary heart disease, cancer and various nervous system diseases at any time due to excessive psychological pressure. All these changes and manifestations did not happen suddenly, but happened constantly and developed gradually. Although this is the natural law of human body, if we can pay attention to nutrition and health care, we can delay or alleviate the occurrence of the above-mentioned physiological phenomena of decline. If it is not prevented in time and continues into old age, it will become an incurable senile disease, so middle age is a critical period after health care.