Urban: His understanding is incredible, and he becomes an immortal starting from practicing martial

Twenty days later.

When Bai Xuan looked at himself in the mirror, his eyes couldn't help but reveal a bit of surprise.

What should I say?

A body with sharp edges and corners, clear lines, well-proportioned and explosive muscles.

And that skin that looks like white jade.

The extreme external training method works from the outside to the inside, layer by layer, to train the skin, muscles, fascia, and skeleton to the extreme.

Exercising the skin tissue to the extreme will naturally cause changes in the skin, but Bai Xuan did not expect that the changes in the skin would be so obvious.

As white as jade, without a single flaw.

It is said that one white skin covers all ugliness. Bai Xuan's appearance is not bad at all. With his perfect muscles and his white jade-like skin, he looks so handsome.

"With such good looks, he could debut as a star directly."

"Even among the current male celebrities, how many can compare with me?"

"But I'm not interested in making money through this method"

"After this period of study, I have mastered top computer technology and will be able to make a lot of money in no time."

"So how should we use such good looks?"

"Maybe it can only be used to seduce beautiful women?"

Bai Xuan is also a normal male, and naturally has a certain interest in the opposite sex.

It's just that Bai Xuan is very picky, otherwise he would have found a girlfriend long ago, and it's not like there are no girls chasing him.

But after awakening to his heaven-defying understanding, Bai Xuan is more To some extent, she will become more arrogant and picky.

After all, her future self will definitely be able to become an otherworldly existence.

How can such a self find an ordinary beauty casually?

Even if she wants to find one, she will have to find one to a certain extent. Find a beautiful woman who can help you, such as a talented girl with top scientific research capabilities. She has a high IQ and good looks, otherwise how can she be worthy of you?

Although, perhaps no one in this world can be worthy of you..

Then if it is the opposite sex that is not worthy of him.

Unless he is very good-looking, Bai Xuan will not even think about playing.

Of course, if he is just very good-looking and has no other advantages,

Bai Xuan will naturally just play for fun.

"never mind"

"Let’s not talk about the impact of appearance for the moment"

"After all, skin does more than just look good."

As soon as his thoughts changed, Bai Xuan remembered the definition and function of skin.

Skin is an organ that covers the surface of the body and is in direct contact with the external environment. It has the functions of protection, excretion, regulating body temperature and sensing external stimuli. It is a human body. The largest organ in the body.

The skin is divided into two layers: epidermis and dermis. The epidermis is on the surface of the skin and can be divided into two parts: the stratum corneum and the germinal layer. The cells that have been keratinized form the stratum corneum. After falling off, they become dander and hair growth. The stratum corneum cells are constantly dividing to replenish the shed stratum corneum. There are melanocytes in the germinal layer, and the melanin produced can prevent ultraviolet damage to internal tissues. The epidermis is a stratified squamous epithelium, and the dermis is a dense connective tissue with many elastic fibers and collagen fibers. Therefore, it has elasticity and toughness.

The dermis is thicker than the epidermis and has abundant blood vessels and nerves. There is subcutaneous tissue under the skin, which is a loose connective tissue with a large number of fat cells. The skin also has many appendages such as hair, sweat glands, sebaceous glands, and nails.

"Although the extreme external refining method strengthens the hardness, elasticity, and toughness of the skin to the extreme, the skin also has the ability to excretory, sense, and regulate body temperature, and it should be able to continue to be strengthened in the future."

"But think about it, it is unrealistic to enhance all the functions of the skin to the extreme in one go. Naturally, you have to do it step by step."

"I'm not in a hurry, I still have a lot of time"

"And speaking of it, since the defense of the skin has been trained to the limit, bullets will definitely not be blocked, but can I block the fruit knife now?"

"Give it a try."

Picking up the fruit knife, Bai Xuan pressed it lightly.

The skin was dented but not broken. As he continued to apply more force, red marks appeared on the skin, as if it would be torn apart by the blade soon, so Bai Xuan stopped.

"It is true that the fruit knife cannot cut my skin without using force, but a healthy adult male can still cut my skin with the fruit knife as long as he uses all his strength."

Pinching the tight muscles under the skin again, Bai Xuan continued to think.

"The extreme external refining method·skin refining chapter has been completed successfully"

"Next is the meat training chapter. My muscles have been trained to a certain extent through Tai Chi fitness method, but they are still far from the limit."

There are about 639 human muscles, composed of about 6 billion muscle fibers. The longest muscle fiber is 60 centimeters and the shortest is only about one millimeter.

Large muscles weigh about two kilograms, and small muscles weigh about 2 kilograms. Only a few grams, the average person's muscles account for about 35 to 45% of the body weight.

According to different structures and functions, they can be divided into three types: smooth muscle, cardiac muscle and skeletal muscle. According to their shape, they can be divided into long muscles , brevis muscle, flat muscle and orbicularis muscle.

Smooth muscle mainly constitutes internal organs and blood vessels. It has the characteristics of slow contraction, long-lasting and not easy to fatigue. Myocardium constitutes the heart wall. Neither of them contracts according to human will, so it is called involuntary muscle.

Skeletal muscle Muscles are distributed in the head, neck, trunk and limbs, and are usually attached to bones. Skeletal muscles contract quickly, powerfully, and easily fatigue. They can expand and contract according to a person's will, so they are called voluntary muscles. Skeletal muscles are striated when observed under a microscope. , so it is also called striated muscle.

The method of exercising muscles is very simple. Just stimulate the muscles through continuous training, which will cause damage and destruction of muscle fibers.

During the training process, the muscle tissue will be stimulated by stress and tension, causing muscle fibers to tiny tears.

The body then repairs these torn fibers through repair and regeneration processes and increases the size and strength of the muscle tissue.

After the muscles are stimulated, the body releases chemicals called growth factors.

These Growth factors promote muscle fiber regeneration and stimulate muscle cells to increase the synthesis of more protein.

Protein is the main component of muscle and plays a vital role in muscle growth.

When muscle cells synthesize and store enough protein, The muscle fibers will enlarge and strengthen. This process can be called muscle metabolism.

Over time, after repeated stimulation and repair, the muscle fibers gradually increase in size and the entire muscle tissue becomes stronger.

However, the human body's exercise capacity is limited , it is almost impossible for ordinary people to exercise all the 639 muscles.

Of course, for Bai Xuan, who has an incredible understanding, this is not a difficult task.

The extreme external training method is able to do

"It’s time to work out, and after you’re done, it’s time to start making money."