Update 1: Thank you for your detailed answer.

Because I saw you mention that judo will also affect your height.

I want to ask again, if a six-year-old child often practices Taekwondo, will it affect his height? I started studying at the age of four.

There is no negative correlation between frenulum and height. There is no certain height. Apart from heredity, diet and diseases, I can definitely tell you that 1) the growth plate of long bones (thigh bones and calf bones) can promote the growth, lengthening and even height of long bones. 2) Excessive muscle development in adolescence will limit the growth of long bones. 3) lacing has nothing to do with height. As we all know, there are two kinds of short people, one is a gymnast and the other is a weightlifter. The former must be stretched, and the latter may not need to be stretched. So it is possible to be short without lacing! . You are a gymnast &; Divers have been practicing since childhood, and they must stretch their tendons before exercise, but no one will know whether they are tall or not. /kloc-one below 0/55 cm. In fact, you grow taller because your muscles develop too early, which means your muscles are too strong, especially when you are about to grow taller in adolescence. If you practice weightlifting, judo, gymnastics, lifting dumbbells and barbells, as long as you use weight-bearing training to make your muscles strong, it will often limit the growth of long bones and your height. So weightlifters and gymnasts are not tall. As we all know, playing basketball and skipping rope will grow taller. Indeed, because when the growth plates of our thigh bones and calf bones are subjected to longitudinal intermittent pressure, that is, jumping and jumping, the long bones of the lower limbs grow out and the legs become longer. If your department is underdeveloped, generally speaking, before the age of 22, premature and long-term "weight/gravity training" will compress your bones, make your muscles tight and tight, and inhibit/delay the stretching and development of your body. (d) Gymnasts have been practicing since childhood, but no one will know if they are tall. All below 160cm. In addition, besides diet, there are some exercises that also help to increase. Generally speaking, the exercise that can make the bone end slightly * * * is beneficial to the height increase, while the exercise that excessively oppresses the bone end should be avoided. For example: 1. Exercise conducive to height growth: and pay attention to a small amount at a time, and it is most effective many times a day. For example, swimming, dancing, unarmed gymnastics, basketball, tennis, skipping, trampoline, jumping ball, stretching gymnastics, short-distance sprint. Second, sports that are not conducive to height: such as weightlifting, mechanical gymnastics, wrestling, fighting, judo, etc. Gym is "anaerobic exercise" (including pull-ups and sit-ups) and resistance training, which can only make it muscular and cannot be maintained for a long time. Once it stops, it will relax and fall. Good physical fitness means high oxygen content in muscles. Continuous aerobic exercise can improve muscle internal force, improve and strengthen physical fitness, and have a good performance. The factors that affect a person's height depend on the growth and development (length) of his own bones, especially the length of long bones such as femur and tibia, but the growth and development of bones is quite slow and can never be achieved overnight. Because growth and development has its rapid stages, the first stage is one to three years after birth, the second stage is about the replacement of deciduous teeth with permanent teeth (about eight to ten years old), and the third and most important stage is adolescence (about 12 to 18 years old). If we don't grasp these three stages, it will be much more difficult to increase them. The peak period of female development: the fastest period of girls' development is about 1 1~ 14 years old. Male growth period: boys 13~ 16 years old, so girls are often taller than boys in primary school, but after middle school, boys will continue to smoke higher and finally be taller than girls! Developmental period to full development: Men mature faster than men before the age of 22 and women before the age of 19. The average female 19 years old, when male is about 22 years old, osteochondral cells stop dividing and cartilage is replaced by bone. The newly formed bone cuboid structure is called the interosseous line, which is the remains of the interosseous plate. The appearance of interosseous lines shows that the growth of bones has stopped, and most of the ossification of bones is completed before the age of 25, and it is difficult to grow taller after that. The growth factor depends entirely on whether the epiphyseal line "growth plate" is closed, especially there are growth plates at the upper and lower ends of the long femur. The epiphyseal line is at the long bone, which needs to be X-rayed to know. You can see a white blurred line at the long bone of the X-ray. Please call a doctor to help you. The chondrocytes of the growth plate have the ability to divide and can make bones grow. Once the growth plate stops dividing and closing, chondrocytes will not continue to divide, and will not grow taller regardless of drugs or various exercises. I think the best way to improve physical fitness is to do more aerobic exercise, jogging+swimming, playing basketball, basking in the sun, going to bed early during prime time (165438+ 0 pm to 2 am) and eating more fruits and vegetables, so that there will be no side effects. In fact, the reason for not being tall is that the muscles develop too early, that is to say, the muscles are too strong, especially when puberty is about to grow taller. If you practice weightlifting, judo, gymnastics, lifting dumbbells, lifting barbells, etc. As long as you use weight-bearing training to make your muscles strong, it will often limit the growth of long bones and also limit your height. So weightlifters and gymnasts are not tall. Therefore, it is recommended not to do weight training before the age of 20, but not that you can't practice, but that you can't practice too much. Lift dumbbells and sit-ups, just do it 30 times a day, not too much. The same is true for muscle training in other places. Don't do too much for too long.

Reference: Sports Medicine &; You You fitness center

I have many friends whose children also learn Taekwondo.

Many of their children have also studied Taekwondo for 3-5 years.

I also saw them grow taller.

On the contrary, doing exercise is better for physical development. Of course, this place is safer.

You can look at the photos of this taekwondo gym, tkdma.