Thirteen was very surprised that Luo Kai could learn the Mighty Dragon Fist so quickly. After pondering for a long time, he felt that he had discovered a genius in physical skills. He simply began to teach Luo Kai physical skills systematically.
The prevalence of physical skills originated from the rapid advancement of biological civilization. Since the catastrophe, all life forms had evolved several times faster to cope with the external environment. The unimaginable changes in the past had now become a reality.
The basic training of physical skills could be roughly divided into three types: Skin Refining, Tendon Refining, and Bone Refining. They could be trained at the same time or separately.
Skin Refining, in simple terms, was to re-condense a layer of cotton-like subcutaneous tissue under the skin. This layer of subcutaneous tissue could greatly reduce the damage of attacks. When trained to the extreme, it could even withstand the damage of bullets.
There was an ancient saying, "Those who refine their tendons will live a long life."
If a person was compared to a bow, the tendons would be the bowstring. How much strength could be exerted depended on how much muscle could be mobilized by the tendons and bones. Moreover, the tendons were not just tendons, they also represented the nervous system. Tendon Refining was to enhance the sensitivity of a person, as well as the coordination and control of the body.
Skin Refining and Tendon Refining could be achieved through years of training. Bone Refining was different, because bone refining was to completely change the human bone structure into a fine honeycomb structure. For example, the skulls of horned creatures such as goats were all honeycomb-like structures. This would greatly increase the endurance of the bones.
Most people needed the help of gene medicine to refine their bones. Of course, there were also people who used external forces to force their bones to change. The younger they were, the higher the success rate. To put it simply, the bones would change to adapt to the external forces within the limits of what the bones could withstand. Over the years, the bones would change to adapt to the external forces and gradually become a honeycomb structure.
After the initial training of the three parts, one could become a "Physique Warrior".
With the support of a large amount of high-energy food, each stage would take about ten years. If injected with gene medicine that promoted the speed of cell division, it would greatly reduce the training time. However, gene medicine came from powerful Direbeasts and was very expensive. With the income of an ordinary family, they would not be able to afford the lowest level of gene medicine in their lifetime. The saying of the poor studying and the rich fighting was still popular in this era.
The Physique Warriors were the main force of the humans in this era to fight against the Direbeasts and other civilizations. They were also the nobles among the humans. Once they became a Physique Warrior, they could receive special benefits in any human country. Be it in the military, politics, or business, they would have an unparalleled advantage.
A good body was the foundation of all physical techniques, and strength was the foundation of the body. Obtaining strength required a substantial increase in weight, or in other words, an increase in the body's muscle density. Here, it was already difficult to accumulate fat, let alone weight.
Since he couldn't gain weight, he needed to strengthen his existing muscles. The most direct way was to overdraft.
If a person exerted all his strength, it would cause slight damage to his muscles. The damaged cells would release an inflammatory molecule, which would repair the muscles and make them stronger. The so-called overdraft training was actually to continuously damage the muscles so that they would continue to repair themselves. As a result, the muscle cells would become stronger and stronger.
Overdraft training in the mine was actually more work. After more than a month, Luo Kai's body that was gradually recovering had become thinner again. There was too little food here, especially high-energy meat.
Seeing Luo Kai becoming thinner and thinner, Thirteen shook his head and sighed, "I originally wanted to wait for your body to become more solid, but the conditions here are not good. If you continue like this, you will overdraft your life force. I might as well tell you about 'Skin Refining' now. If you have the conditions in the future, you can practice it yourself.
To complete the preliminary 'Skin Refining', the first step is to be exposed to the sun. Then, regardless of whether it is cold or hot, try not to wear clothes. At the same time, do striking training every day. As time passes, a thick layer of callus will form on your skin, becoming as tough as leather. At the same time, a thick layer of subcutaneous tissue will form to resist the invasion of the external environment. This stage generally requires ten years of hard work. "
Luo Kai was a little dumbfounded. He could not imagine what it would be like to have a layer of callus all over his body in the future. He stared at Thirteen for a while. Other than having two more arms, he was no different from an ordinary person. He could not help but interrupt, "Won't I become a monster like this?"
"Don't worry, this is just the preliminary Skin Refining. When the subcutaneous tissue is completely solidified, the metabolism of the epidermis will increase several times. When the old epidermis dies, the new epidermis will become tougher and tougher. This is the official practice method of the Body Technique Research Association. If conditions permit, there are many shortcuts, such as injecting gene agents that accelerate cell division, soaking in medicinal baths, or eating Direbeast meat that contains active energy.
Luo Kai muttered silently. He did not have any of these methods. He asked again, "What is a Direbeast?
And what is the active energy in the Direbeast meat? "He had never believed that there was any animal that could withstand bullets or even cannons.
Thirteen frowned, and a cold light flashed in his eyes. After thinking for a while, he finally said, "Direbeasts are very scary … in short, very scary. I don't know what the active energy is, but it is said that it can increase the activity of living cells. That's why it is called active energy."
"Then are you a Physique Warrior?"
Thirteen was silent for a while. He shook his head and said, "I am different from you. I don't need to go through these three stages."
After saying that, a trace of hesitation appeared on his face. He said softly, "The Body Technique I practice comes from a religious Body Cultivation Technique before the Catastrophe. After being improved by genetic technology, it is called Eight Arms Vajra Seal. It requires the fusion of a Direbeast's gene called Eight Arms Ape to practice. This Body Technique mainly trains the muscles, so it doesn't have the three stages."
Luo Kai realized something. He pointed at Thirteen's two extra arms and said in horror, "You … you mean, your arms grew because you practiced Body Technique?"
Thirteen nodded his head and waved his other arm. "I fused with the genes of the Eight-Armed Ape. That's why my body underwent a genetic mutation. Alright, practicing body arts requires hard work and external strength. However, there are no such conditions here. However, since you have learned the Mighty Dragon Fist, most of the prisoners here won't be able to beat you."
Luo Kai looked around and said in a low voice, "Are there any Physique Warriors among the prisoners here?"
Thirteen shook his head and said, "If Physique Warriors have committed crimes, they would not be imprisoned here. There are no Physique Warriors among the prisoners here, but there are a few who are very powerful. Their fighting strength may not be lower than a real Physique Warrior. Although Physique Warriors are much stronger than ordinary people, they are still human. If they are hit by a bullet, they will die. Besides the body, psychological quality, skills, and experience are also very important."