The son once said that if you are a threesome, you must have my teacher.

In order to learn the breathing method, it is nothing to become someone else's disciple.

But stepsons don't have to.

Su Yuan was silent for a moment and asked Numasaburo, who looked depressed.

"What exactly is breathing?"

Numasaburo quickly put away the expression on his face and introduced to Su Yuan.

"Pranayama is a technique that strengthens the heart and lungs, allows the blood to absorb a large amount of oxygen, and makes the physical fitness rise rapidly in a short period of time. Relying on the breathing method, the swordsmen of our ghost killing team can gain strength comparable to that of ghosts in a short period of time, and cooperate with the Nichiren sword to kill ghosts. ”

This verbal narrative is still too abstract.

Su Yuan frowned slightly after hearing this.

"Can you show me a demo?"

Numasaburo nodded briskly.

"No problem."

Although he is still a wounded man, it only hurts his left arm, and it doesn't matter.

"Ah~"

After a moment of preparation, Numasaburo opened his mouth and used his nose and mouth at the same time, and took a deep breath with almost all his strength.

His lung capacity is far beyond the average person. Through the perception of the wind, Su Yuan found that the air inhaled by Numasaburo at this time was 1 times higher than the deep breath of ordinary people, and the entire chest and abdomen were inflated to a degree that was visible to the naked eye.

His heart was pounding and beating faster, the sound he made was like a drum, the blood flow in his body increased rapidly, and his body temperature soon increased by 2-3 degrees higher than usual.

Because of the rush of blood and the expansion of blood vessels, Numasaburo's exposed arms and neck were covered with bruises.

The muscles on his body, which were not very prominent, swelled in a circle, becoming both hard and powerful, and his strength and explosiveness were doubled, not weaker than the demon he had killed yesterday.

This made Su Yuan a little puzzled.

In that case, why did Numasaburo break an arm and be chased all the way by the other party?

But soon, it was probably just over ten seconds, and the time for Numasaburo's reinforcement arrived.

With a breath of turbid air, his body quickly deflated and changed to its usual appearance.

After exiting the state of breathing, Numasaburo's forehead was covered with sweat.

He gasped for breath and looked tired, relieving the pressure in his body.

This made Su Yuan suddenly understand.

Although the breathing method provided Numasaburo with strength and explosiveness that was not weaker than that of an oni, it lasted for a short time.

After all, even if he took a big breath, the oxygen content in it was actually not high, and it would be consumed quickly.

If you can't quickly cut off the head of the demon before the oxygen runs out and is forced to breathe, you will exit this state when you are exhausted, and you will not be an opponent of the demon at all.

Unlike Su Yuan, after becoming a Wind Resisting Swordsman, he has always had the wind around him, and unless his physical strength is exhausted, he is in good condition all the time.

In contrast, the Ghost Slayer Slayer's breathing method is simply unsuccessful, and it becomes a benevolent!

If it hadn't been for Su Yuan's help yesterday, Numasaburo would probably be a dead man by now.

After watching Numasaburo's demonstration, Su Yuan also understood the principle of the breathing method.

"By allowing a large amount of oxygen to enter the body, the outside pressure is used to force the heart to beat faster, causing the lungs to expand and accelerate the blood flow in the body, so as to obtain power comparable to that of ghosts."

If the wind of the Wind Resisting Sword Art is the force that acts on the outside, then the breathing method is the method that acts on the inside and strengthens itself.

But this breathing method is much rougher than the Wind Resisting Sword Technique.

The wind of the Wind Resist Sword can be attached to weapons or oneself, and can also be used to sense, and does not cause damage to oneself.

However, if the physical fitness of the user of the breathing method is not strong enough, the heart and lungs will be greatly damaged after repeated use of the breathing method, and it is extremely easy to lose life.

In order to match the breathing method, the swordsmen of the Demon Slayer must undergo long hours of training to strengthen their physical fitness.

Otherwise, the number of times you use the breathing method is too much, and you may even die violently.

"But for me, that doesn't matter."

After becoming a Wind Resistant Swordsman, Su Yuan's physical fitness was strengthened and he obtained the skill [Steel Slashing Flash].

After that, he was promoted to one level, his body became stronger again, and he obtained the skill [Forward Slash].

This made Su Yuan guess whether he would gain a skill and strengthen his physical fitness every time he leveled up.

But the higher the level, the less experience he gets after killing the beast.

So there are two paths in front of Su Yuan.

One is to level up quickly, get a physical improvement, and master more new skills.

The other is to take it slowly, first increase the level of the skills you have learned, and then level up.

Su Yuan currently has no urgent need to upgrade and improve his strength, so he chose the second path.

If the level is too high, you may not be able to gain too much experience points by slaying demons in the future.

Now that there is a breathing method that can improve combat effectiveness in front of Su Yuan, there is no hurry.

After Numa Saburo rested for a while, Su Yuan let him try to use the breathing method again.

This time he put his hand on Numasaburo's chest and used the wind to sense the rhythm of his breathing.

This is not a skill, it can only be regarded as a skill to use Wind Affinity.

It's like sprinkling lime on the opponent before a fight doesn't count as a skill.

After another demonstration by Numasaburo, Su Yuan took two steps back, closed his eyes and began to simulate in his mind.

Numasaburo gasped and rested, and looked at Su Yuan curiously, not knowing what he wanted to do.

Soon, Numasaburo noticed that Su Yuan's breathing rhythm began to change.

The time he inhaled grew and the amount of air he inhaled into his chest increased.

At this time, Su Yuan's chest was like a balloon, constantly expanding, retracting, inflating, and retracting......

After repeating for more than ten minutes, Su Yuan suddenly opened his eyes, and then took a deep breath.

He used the power of the wind to inhale a lot of the air around him.

With the pressure of the wind and air pressure, Su Yuan felt as if his lungs were injected with a pump that was constantly taking in air, expanding at a high speed in his body.

A large amount of air in the lungs rushes into the blood like a shock wave, and while the oxygen is rapidly integrated, it also drives the blood to flow at a high speed, and the whole person enters a state of excitement as if he has been hit with chicken blood.

The high-speed flow of blood, in turn, hits the muscles in the heart area, forcing the heart to beat faster and adrenaline to be secreted.

Just like Numa Saburo just now, the muscles on Su Yuan's body swelled up and became stronger and more powerful.

The blood vessels in his body bulged like earthworms, sticking to the taut skin, as if they were about to burst open in the next moment.

"This is my Rock Breathing Method?"

Su Yuan's talent completely shocked Numasaburo.

After comparing it with his own poor talent, he was even so jealous that he wanted to go crazy.

"Just by seeing how I've used the Rock Breath twice? No way! When pigs fly! I don't believe it! ”