Introduction to the influence of boys' height development

Many boys are generally much shorter than girls in elementary school. At this time, parents may be very anxious to buy some supplements for their children. In fact, this is unnecessary. When they reach junior high school, boys develop very fast and may be much taller than girls. Below I will introduce to you the impacts on boys' height development.

Impact Introduction:

Height refers to the length and proportion of the longitudinal parts of the human body. It originates from the longitudinal growth of the human body and is greatly influenced by genetic factors. For males between 20 and 24 years old and for females between 19 and 23 years old, the long bones of the limbs and the spine have completed ossification and their height stops increasing. There are many factors that affect height, such as genetics, nutrition, sports, environment, lifestyle, race, endocrine system, early or late sexual maturity (those who have their first menstruation at the age of 18 are 5 cm taller than those who have their first menstruation at the age of 11), marriage between distant relatives, medical progress, etc.

In the past 20 years, the average height of people in countries around the world has increased by 1 cm every 10 years. There is a trend that human beings are getting taller with each generation. According to records: More than 200 years ago, the average male height in the United States was 170 cm. Now it has reached 175 cm for men and 161.5 cm for women, an increase of 5 cm. In the past 30 years, the average height of 14-year-olds in Japan has increased by 8.2 cm. In Sweden, from 1851 to 1931, the height of recruits increased from 166.6 cm to 174.1 cm, an increase of 7.5 cm. The former Soviet Union measured the bones of soldiers in the 18th century and found that the average height of soldiers had increased by 20 cm in the past 250 years. In the past 20 years, the average height of urban youth aged 18 to 25 in my country has increased by 2.3 cm for men and 2.15 cm for women.

A person's final height in adulthood depends on genetics, nutrition and the body's own endocrine hormones. Under normal circumstances, there are two peak periods in the rate of height growth. The first peak is from birth to about 3 years old, and the second peak is puberty. The growth rate of adolescent boys and girls is not the same, but the difference is different. Generally, girls start a little earlier, around 16 years old, and boys start around 18 years old.

In fact, a person's height is affected not only by race and genetics, but also by nutritional status, environmental factors and other factors. Long-term malnutrition will also hinder development.

The above article introduces the influences on the development of boys' height. I believe that everyone has some understanding. Don't be too anxious about your children in normal times, and don't force them to grow too fast, as this may affect their normal development.