Li Shu's swimming speed is very good, which is mainly due to his physical fitness, especially the strength of his heart and hands, legs and limbs, and the coordination of the overall trunk.

On average, it takes Li Shu about 24 minutes to swim every 1,500 meters. When converted into speed units, it is about 60 meters per minute.

This result is already considered very outstanding among ordinary people.

For this reason, he also searched online and found that the current world champion's time in the 1500m freestyle is around 15 minutes.

Although they look very different, they are almost at the top level of ordinary people.

Li Shu's chest rose and fell slowly and leisurely. After a long period of soaking, his wrinkled fingers returned to their original shape, and his wheat-colored skin looked smoother and tighter.

Li Shu knew that this was just an illusion caused to his eyes by the sunlight hitting the moist skin. Only by swimming for a long time could it be possible to improve the firmness and smoothness of the skin.

But what’s funny is that Li Shu had heard such an interesting story before. It was probably that some girls who love beauty insist on taking a bath every day in order to improve the texture of their skin.

Over time, the skin became worse, and some dense pimples even appeared. Sometimes the skin would be inexplicably itchy.

Later, after visiting a dermatology clinic, I realized that I have a sensitive constitution. I don’t know how many people’s bodies have been washed away by the water in the swimming pool. Although the water is regularly disinfected and changed, there must still be bacteria, urine and other residues in it.

As a result, some of them with sensitive constitutions came into contact with the water and developed skin diseases over time. After being passed from person to person, they also developed these symptoms.

My body has warmed up a lot.

It has to be said that Li Shu had a personal feeling for his body when he was treading water and stretching his muscles.

During exercise, although the current attribute points are indeed increasing slowly, they will still bring continuous excitement and pleasant effects to the body.

This feeling is definitely much stronger than before without the panel.

Compared with before, the body has become more sensitive to exercise-activating factors and even some neurohormones, such as glucocorticoids and adrenaline, which can put people in a state of excitement.

And through various practices and exercises, the conditions and opportunities required to obtain this factor or hormone are gradually decreasing.

To put it simply, it is easier for Li Shu to obtain dopamine and adrenaline produced by the brain, factors that can make him excited and active.

The first time he tried a 30-kilometer long-distance run, he could only experience a running climax after more than 20 kilometers.

But as time went by, Li Shu's health got better and better, and after the index soared, this time point also continued to move forward.

From more than twenty kilometers to twenty kilometers.

From twenty kilometers to eighteen kilometers.

In the end, it was controlled within 15 kilometers. And once Li Shu started to warm up and was already excited about running within six kilometers!

Not only is it easier to get in, but the duration of excitement is also increased.

Later, in a standard marathon, Li Shu was able to stay excited almost from more than ten kilometers to the latter part of the race.

puff.

Li Shu spit out the pool water that accidentally poured into his mouth into the sewer on the shore. He put his whole head into the water to prepare for his fourth 1,500 meters!

After each swim, Li Shu will rest for 15 minutes, but his body will keep swinging to keep the skin, meridians and even bones and brain excited, so that he can quickly enter the state.

Li Shu opened his eyes in the water. Because the pH value of the water was a bit high, Li Shu's eyes felt a little astringent, and he felt obviously spicy and painful when he was in the water.

This has little effect on Li Shu, except that his eyes are slightly red. Once he gets used to it, the pain will decrease and there is no need to worry about inflammation.

Li Shu quickly entered the rhythm state with ease, as if he had turned into a fish in the water!

He suddenly had a bold idea!

He was not breathing for the moment, and there were no gills of aquatic fish inside. Li Shu also wanted to try to imitate the fish's expression and movements.

He gradually substituted himself into the fish. Although the body structures of humans and fish are as different as heaven and earth, humans have a lot of imagination.

For example, the founder of Tiger and Crane Shuangxiang Quan once painted tiger-patterned cranes and spent countless hours observing the living habits and movements of tigers and white cranes.

There is also the Snake Step of the Mantis Fist, which those who are less accomplished will copy, those who are more accomplished will substitute it, and those who are more accomplished will become it.

This means that simply imitating the movements of animals can only bring you to a small level of success. If you put yourself into the animals, you will already have a great level of success.

If it is perfect, then in the eyes of others, this person must be crazy because he has become an animal.

He believed that he was a snake and a mantis. Except for his appearance and consciousness, he no longer looked like a human being.

At this time, Li Shu was somewhat consistent with this situation, but it did not reach such an exaggerated situation.

He muttered in his mind that he didn't have time to breathe. Only one-third of his body was out of the water, and his posture and movements were pretty standard.

His hands and legs still slid and slapped the water, but in addition to kicking the water, his feet also had a side-to-side swinging motion.

Li Shu thought silently in his heart, for half a minute...

One minute…

Two minutes…

His mouth was expanding and contracting, as if he was simulating breathing.

Bang, bang.

His heart was still beating strongly, and as Li Shu's mouth expanded and contracted, his stomach also rose and fell in response.

It's strange that without knowing it, Li Shu broke his own underwater breath-holding record.

A normal adult man's underwater breath-holding time should reach the standard of 30-60 seconds, otherwise his vital capacity is very poor.

For people who can generally last two minutes on the water, due to the pressure underwater, this time will usually be reduced to half of the original time, or even lower.

Li Shu was like this before. He could hold his breath for about three minutes on the water, but once underwater, he could only hold his breath for less than two minutes.

And today's underwater breath-holding world record is even more shocking.

22 minutes!

Not only that, he can also swim while holding his breath! And his speed is much faster than Li Shu.

There are also such powerful people all over the world. They all use abdominal breathing, which is consistent with the current Li Shu posture, allowing oxygen to flow in the body, achieving the effect of pretending to be self-sufficient at noon.

call!

After going through two back and forths, Li Shu finally couldn't help but wave his hands and paddle while tilting his head out of the water, and took a long, hard breath.

Cool!

Exactly two round trips, about 4 minutes.

Compared to the previous two minutes, I have made a lot of progress!

In this way, Li Shu swam two rounds at a normal speed without apnea, that is, after 200 meters, he thought he had rested enough, so he continued to try apnea.

This time, it was a little more than two round trips, about 230 meters, and we made progress by more than half a minute.

This progress can be described as rapid. After 1,500 meters, Li Shu's performance was outstanding!

1500 meters, time 23 minutes and 19 seconds!

Fastest so far.

And Li Shu’s underwater breath-holding successfully broke the 6-minute mark.

Now he feels more and more that those great masters who can easily shut up for ten or twenty minutes are awesome. I am afraid that their abdominal breathing has reached a level of proficiency!
Chapter completed!