Men are most afraid of seeing such "photos"

When women enter menopause, they generally experience obvious physiological changes such as menopause. However, the process of this change in men is mostly unclear. Experts believe that some physiological changes can serve as signs of male aging:

1. Vision: The lens of the eye becomes thicker with age. Men will gradually experience obvious vision loss and inaccurate focusing after the age of 50.

2. Hair: With the increase of age, the number of hair follicles on the male scalp decreases, the hair becomes thinner and thinner, and the hair growth rate becomes slower and slower. More and more men are suffering from baldness.

3. Heart function: After the age of 20, the ability of a man's heart to regulate during strenuous exercise decreases. A 20-year-old boy's heart rate can reach 200 beats per minute during exercise, which decreases to 140 beats per minute at the age of 30. After that, the fastest heart beats per minute decrease by 10 beats per minute for every 10 years of age.

4. Hearing: The eardrum becomes thicker, the ear canal shrinks and narrows, and the ability to distinguish tones, especially high-frequency sounds, becomes increasingly difficult. This condition becomes increasingly obvious after the age of 60.

5. Oxygen supply and endurance: A 70-year-old man's physical strength is only half that of a 20-year-old man.

6. Lung function: The chest bones become stiffer and stiffer, and the muscles that control breathing become more and more burdened. More harmful substances remain in the lungs when breathing.

7. Fat: Between the ages of 25 and 75, the proportion of fat tissue in men's bodies will increase by nearly 100%, and most of the increased fat is accumulated in muscle and organ tissues.

8. Sexual frequency: It is inevitable that the frequency of sexual impulses will decrease. According to statistics, the average number of orgasms per year is 104 for people around 25 years old, 52 for people around 50 years old, and about 22 for people around 70 years old.

9. Penis erection angle: The erection angle of men between 30 and 50 years old is slightly lower than that of young men, and it is significantly lower between 50 and 70 years old. Cardiovascular disease is the main reason for this.

10. Muscles and bones: Developed muscles gradually atrophy and become weak, and bones undergo degenerative changes.