Introduction: When people are old, they are like a dehydrated vegetable, with wrinkled skin, no longer tall and straight figure, and their face is one size smaller than it was 2 years ago. In fact, the "atrophy" of the human body is far more than that.

First, the heart shrinks by .3g every year.

Johns Hopkins University in the United States conducted a study on people aged 45-85, and found that the heart muscles of middle-aged people will shrink by .3g every year on average, which directly affects the blood supply capacity of the heart. With each year's growth, the heart beating cycle will be lengthened by 2%-5%, and the total blood supply will be reduced by 9 ml. Graham Jackson, a cardiologist at Guy and St. Thomas Hospital in London, England, pointed out that cardiac atrophy leads to high blood pressure in old age and may also lead to other serious problems such as anemia.

maintenance rules: experts believe that people's heart rate is accelerated and myocardial contraction is strengthened during exercise, which can make heart muscles stronger. Experts point out that the best way to exercise the heart is to take a walk, do housework and other daily activities. Walking for 4 minutes every day, five times a week is enough. Experts especially remind that heart rate is an important criterion to judge whether the myocardium is strengthened, and the suitable heart rate for aerobic exercise should not exceed 17.

Second, the brain shrinks by 15% in a lifetime.

When a person is born, his brain weighs about 4g, and the duration of puberty is about 1.4kg.. But from the age of 2, it will gradually shrink, and it will shrink by about 1%-15% in its life. Studies have found that the most shrinking parts of the brain are the frontal and temporal lobes that control thinking, planning and memory. Modern medical speculation may be due to the deposition of toxins in the brain, or the normal regeneration and death of brain cells, which makes it smaller and smaller.

Maintenance rules: To protect the brain, it is necessary to keep the cerebral vessels unobstructed and avoid sclerosis and stenosis. Experts say that it is best to eat lightly; Avoid bad posture of cervical vertebra; You can also eat more acidic foods or take aspirin to prevent platelet aggregation from blocking blood vessels. In addition, emotions have a greater impact on the brain than food. Some people engaged in artistic work such as singing, even at the age of 8, have obviously younger brains than their peers and developed brains, which may be related to venting their inner bad emotions through singing; And people who are usually anxious and depressed, their brains will shrink and age in advance.

Third, the spine began to shrink at the age of 35.

Statistics show that after the age of 4, the height of most people decreases by about 1 cm every 1 years; By the age of 8, the height of men is generally 5 cm less than that of young people, while that of women is about 8 cm less. This is first because of the atrophy of the spine. From the age of 35, with the decrease of bone metabolism and the gradual loss of minerals such as calcium, the spine began to shrink. However, men have strong muscle support, while women's estrogen levels that protect bones drop rapidly during menopause, resulting in more spinal atrophy. Secondly, shortening is also related to the long-term compression of the intervertebral disc by the human body. The water content of intervertebral disc is as high as 88%, and its water content will decrease with age, and people will become irreversibly short.

Maintenance rules: Experts pointed out that in addition to supplementing calcium and vitamin D, reducing smoking, excessive drinking and excessive caffeine intake (drinking more than eight cups of coffee or tea every day), Israeli research also found that people who regularly engage in aerobic exercise have a lower degree of height shrinkage by half. Experts remind that correct posture is the key to delay the aging and atrophy of intervertebral discs. The best standing posture is at ease, which helps to relax the spinal muscles; Sitting in front of a computer or desk, you should keep your thighs and knees at 9 degrees and your thighs and waist at 9 degrees. The cervical vertebrae should be in a neutral position, not low or upturned. When driving, you should put a small cushion behind the cervical spine and lumbar spine to keep their physiological curvature.

fourth, the sex organs are reduced by 2-3 cm.

"If the length of a man's sexual organ erection is about 15cm at the age of 3, it will be reduced to about 12-13cm at the age of 6 or 7." Experts explained that this is mainly because fatty substances accumulate more and more in arterioles, leading to atrophy of muscle tissue. In addition, the testicles began to shrink from the age of 4, and by the age of 6, they were like two shriveled balls, with the diameter reduced by more than 1 cm. Women's uterus will also shrink after menopause, return to the size of the undeveloped girlhood, and slowly stop moving. This is due to the decrease of estrogen, resulting in less and less blood flowing to sexual organs.

Maintenance rules: Experts say that properly increasing the frequency of sexual life can improve the blood flow and oxygen supply of sexual organs. In addition, eat more low-fat and vasodilating foods such as ginkgo biloba, onions and carrots to prevent fat accumulation.

5. The facial mandible is the most prone to atrophy.

People always think that the reason why a face changes from youthful fullness to ravines and sunken cheeks is due to the loss of muscle tension and the gravitational pull of the earth, but in fact, it is the atrophy of facial bones. The mandible is the most prone to atrophy on the face. Since you lost your first tooth, the mandible supporting it began to atrophy. Women's facial bones generally begin to age from their early 4 s, while men begin to age from 5 to 55 years old.

maintenance rules: it is most important to protect teeth and reduce tooth decay and tooth loss. Among them, it is best to brush your teeth several times after eating meals every day, within 5 minutes after meals, and for about 3 minutes each time.

Sixth, the bladder capacity is reduced by half.

At the age of 25, people's bladder can hold two cups of liquid on average; At the age of 65, the capacity is only half of the former.

Maintenance rules: Don't take too much caffeine or alcohol, and do pelvic floor muscle exercises every day to improve the bladder control. Try to tighten and lift * * * and * * * to find the feeling of "stopping urine flow when urinating", 8-1 seconds at a time, 1 times as a group, and practice 1 groups of * * * times a day.

7. Thymus atrophy reduces immunity.

why do people get sick easily when they are old? Experts explain that this is because the thymus gland, which can produce anti-infective cells in the human body, is shrinking. Thymus is a very small organ above the heart. In childhood, it was as big as an apple. It began to shrink in adolescence and became as big as a small stone in adulthood. Its atrophy leads to the decline of human immunity, especially making the elderly more susceptible to cancer.

maintenance rules: eat more low-calorie food, and in addition, it is best to hold a hollow fist with one hand every day to touch the thymus.