At this time, Jin Yan on the side said: "Although the use of martial arts is your own business as a warrior, I still want to remind you!"

She looked at Zhang He's limp body and said sincerely: "Now that your combat power has increased too quickly, your body's endurance cannot keep up, so you can't use Kaio Fist frequently!"

"In addition, you have not fully recovered from your injuries after the battle in the past few days. So I suggest that you can only use Kaioken once a month at most!"

Zhang He was slightly startled: "What about two times?"

Jin Yan smiled coldly: "He exploded and died!"

Zhang He was stunned for a moment, his head filled with questions.

Teacher Jin Yan, are you scaring me again?

Just now he was scaring us with the "transformed beastman".

But there is one thing that Zhang He can clearly feel.

Just now, I used Kaio Fist twice, and the load on my body increased several times compared to before.

It used to be able to last for five minutes, but now it only lasts for ten seconds.

Fortunately, Teacher Jin Yan let go, otherwise she would have wasted all her efforts and struggled to make progress.

But after it was over, I felt like my body was hollowed out and I could only lie down without moving.

This is not possible. Now I need to urgently improve my body's endurance.

Immediately, Zhang He asked directly: "Teacher Jin Yan, how can I improve my physical endurance?"

Jin Yan looked at him with a half-smile but not a smile: "Death and life!"

Happy readers!

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Chapter completed!