One day, at the age of fifteen and three months, Xi Gu suddenly realized that he had become a capable person.

There were no obvious signs at first, but after getting out of bed one Sunday morning, Xi Gu clearly felt something different in his body.

Not that fundamental change.

There are no strange patterns on the skin.

None of the pupils in the left and right eyes are discolored.

There are no horns on the head.

The limbs are not deformed.

There is no such strange air flow around him.

- It's just a slow, gradual, slowly upward evolution.

"Is my eyesight a little better?"

Xi Gu strangely took off his 350-degree glasses, and found that the world he saw without glasses was clearer than when he wore them, as if his myopia had been reduced by half overnight.

He jumped on the spot again, feeling much lighter than before.

Although he noticed the changes in his body, Xi Gu only regarded it as a symbol of his body's growth on this day, and did not take it to heart.

The next day, things continued to change.

After waking up, Xi Gu felt that his body was much lighter than yesterday, and his eyesight was much better.

I took off my glasses completely, and the world in front of me was bright and clear for the first time in a long time.

In addition, Xi Gu tried to swing his fist, and the fist wind "snorted", like the sound of breaking silk.

Xi Gu's mood became even more cheerful.

In the physical education class that day, in the 1,000-meter physical test, Xi Gu, whose endurance has significantly improved, ran for the first time in three minutes and twenty seconds, and he was still at ease. Although it wasn't that he couldn't run faster, Xi Gu restrained a little in order to avoid being too noticeable.

Still, friends noticed the change in him.

"What's wrong with you kid today?"

The friend grinned and pounded his chest: "Hey, Xigu, have you taken a fancy to any girl?" I ran so hard, I played at a super level today, right...... By the way, why don't you wear glasses? ”

I casually said "no, no", "I'm just exercising recently", "I took off my glasses after I noticed that my eyesight had improved...... Fortunately, I have a low degree, maybe pseudomyopia. Xi Gu's heart was full of joy.

He thought to himself that if his physical fitness continued to grow like this, maybe he could become a blockbuster and become a national-level athlete, and then he would be able to enter a top university without going through the harsh college entrance examination.

- It's a simple wish, but for a high school student like Xi Gu who is studying in a third-tier city and can't get good grades, this is already a rare ambition.

On the third day, as expected, the physical fitness improved again compared to the previous day.

That night, Xi Gu went to the fitness room in the community after school, opened a card, bypassed the strong men who were lifting irons, and went to the boxing test machine in the corner to record his results.

“105kg。”

“107kg。”

“104kg”

……

Charging force threw dozens of punches, and after counting them, Xi Gu found that the median of his boxing strength test data was around 105kg, which was relatively stable.

After getting this data, Xi Gu, who was satisfied, came to the runway of the campus again, took the timer himself, pressed the start button and rushed forward desperately, until he crossed the white line of 200 meters before he stopped out of breath and looked at the timer in his hand-

"24.07 seconds, it's okay."

On the fourth day, when I woke up early in the morning, it was not surprising that the feeling of improving my physical fitness again came again.

After school in the evening, Xi Gu, who had been prepared, continued to come to the fitness room of the community and hugged it in front of the boxing testing machine that no one cared about.

"107kg", which is the median of today's test results.

Xi Gu probably understood.

"Every day is 2kg stronger than the day before? But this is the impact force, and I don't know how much the core strength of the bench press has grown in comparison...... But it should be pretty much the same. ”

The two-hundred-meter test continued on the school's track that day -

"23.58 seconds." It's unusual to see a few tenths of a day in a day, but Xi Gu understands that a lot of it is due to the fact that he adjusted his running form and preparation posture today.

For beginners who are new to the track, it is normal for even 200 meters to change by more than one second.

On the third day, the punch power continued to change steadily. “109kg”。 And the speed of 200 meters has only increased slightly, "23.56 seconds", sure enough.

However, Xi Gu obviously felt that after he threw his fist out today, most of the test data was "109kg", and he ran several times for 200 meters at the same time, but the result was "23.56 seconds" each time, and it was obvious that the stability and endurance of the body were also rising simultaneously.

"If I continue to improve steadily, maybe I can become an overall Olympic champion...... Forget it, it's better to be careful, for the sake of insurance, in order not to be arrested by the relevant departments to investigate, in the future, the 100-meter running will be the main - this is the most famous sport. ”

Anxious and expectant, Xi Gu drew a beautiful blueprint for his future with a small expectation.

However, this small expectation turned into a stunned one day later.

"112kg, why does it change so quickly?"

Xi Gu looked at the data on the boxing testing machine in amazement, and immediately understood something.

"Wait...... My physical fitness won't grow exponentially, will it? ”

Xi Gu, who understood it, began to change his thinking.

In order to avoid being eye-catching, he no longer tested in the gym, but took out a small 10,000 yuan from his parents' inheritance, and bought a series of instruments including weight beds and barbells in his own home to test the simple chest and abdominal strength that removes the influencing factor of fist speed.

Although it hurts a little, if it's really like what I thought, then it's a big deal.

Next, Xi Gu stopped the 200-meter run test at school, and every morning he would get up in front of the weight bench to test his strength limit.

After a few days of progress, the stability of his body has reached a good level, so Xi Gu can easily test the limits of his body, and he records his daily test data in detail-

“101kg”，

“102kg”，

“103kg”，

……

On the 10th day, Xi Gu began to feel that "110kg" was obviously more than comfortable, and on the 14th day, Xi Gu could barely lift the weight of "115kg", and after 50 days, the test results showed that his strength had increased to "164kg".

For a high school student, this is undoubtedly a very good grade. But Sigu doesn't care about this result – because for him, after tomorrow, he will leave it behind and easily increase his bench press by more than a kilogram.

I checked my strength growth data in detail, drew a smooth curve on the tab, and found the corresponding exponential formula.

Finally, at this moment, Xi Gu completely understood what kind of speed his body was growing-

That is to say...... Every day that passes, my physical fitness is one percent stronger than the day before?! ”