Chapter 206: Starting Constant Training

"Every time the Breathing Technique reaches a new level, it undergoes a qualitative change. The next realm of proficiency in using Total Concentration Breathing is the state of uninterrupted Total Concentration Breathing, keeping your body in a state of Total Concentration Breathing every moment."

Mutsuki began guiding Shisui and Obito in the training of Breathing Technique Constant.

In the world of Demon Slayer, mastering Constant is the foundation of becoming a Pillar (Hashira) and is a very crucial training that can greatly enhance physical abilities.

Similarly, the Naruto-style Breathing Technique Constant is equally important. If you can master Constant, the ability to accelerate Nature Transformation will become permanent, meaning your Nature Transformation will be stronger than usual, significantly enhancing your physical abilities.

Mutsuki's increasing physical strength has a lot to do with the Constant of Stone Breathing.

"Huh? Maintaining Total Concentration Breathing all day? How can I do that? I'd die from exhaustion." Obito thought about his state when using Total Concentration Breathing and found it hard to imagine.

Shisui looked at Mutsuki with some confusion, wondering how Total Concentration Breathing, typically a burst technique, could be trained to be maintained 24/7.

"It's not as hard as you think. Practice more, and you can do it," Mutsuki said with a smile. Given Obito's compatibility with Flame Breathing, there wouldn't be any problem with Constant.

"But right now, I can only maintain Total Concentration Breathing for four minutes," Obito felt that Mutsuki's advice to practice more might mean practicing for over a decade.

"Breathing Technique Constant doesn't require you to be in an extreme state of breathing every moment; it's relatively concentrated. Suppose your extreme breathing can enhance your power by a hundred, with Constant, you only need to achieve seventy or eighty," Mutsuki explained.

"So that's how it is, but wouldn't that use up a lot of Chakra?" Obito began to understand a bit, then continued to ask. In the Naruto world, the Breathing Technique only achieves maximum effect when combined with Chakra.

"When not in combat, you can avoid using Chakra or maintain a minimal Chakra output. There will be specialized training for this," Mutsuki explained.

Of course, it's best to include Chakra for enhanced effects and to avoid adjustments during combat. Since the disciples have limited Chakra right now, they'll have to practice a basic version first.

With this explanation, Shisui understood the significance of Constant. Essentially, it's to raise the upper limit of their Breathing Technique.

If they can maintain Breathing Technique at an output of eighty percent all day, their true breathing limit would no longer be one hundred, possibly increasing several times over.

"First, enter a state of Total Concentration Breathing without using Chakra." After explaining, Mutsuki began formal Constant training with the students.

Obito and Shisui followed Mutsuki's instructions to enter Total Concentration Breathing.

Slap!

Obito got a smack on the head. Mutsuki retracted his hand and said, "Don't use Chakra."

With his Byakugan, Mutsuki could clearly see that Obito was using Chakra for the Breathing Technique.

"Hehe, it's a habit. I used it subconsciously," Obito scratched his head in embarrassment, having made a mistake right at the first step.

Usually, Total Concentration Breathing is used to defeat the enemy in one go, so naturally, one would use it at full strength.

Boom!

Suddenly, a loud noise erupted. Obito and Shisui looked over to see Mutsuki's Shadow Clone bringing over several stones of varying sizes. The smallest was about the height of Obito, while the largest was over three meters tall.

"Come on, let's start training. Do squats while holding these stones until you can't maintain Total Concentration Breathing anymore," Mutsuki cheerfully pointed at the boulders.

"Starting with this level of difficulty?" Obito was stunned. He remembered that when they first started training Breathing Technique, it was just about breathing in and out on the spot. This Constant training was visibly intense.

Shisui walked up calmly, tested each stone, and finally chose one about the height of Obito. He lifted it and began doing squats.

The stones looked heavy, but in the state of Total Concentration Breathing, even without Chakra, there was a considerable boost to physical abilities.

Seeing Shisui start training directly, Obito quickly walked up and chose a stone slightly larger than the one Shisui had picked. It wasn't that he was being competitive; it was simply that Shisui had taken the smallest one.

However, when Obito lifted the stone and started doing squats, it wasn't as heavy as he had imagined.

Of course, this was just the beginning. As time passed, after five minutes, Obito began to struggle and found it difficult to maintain Total Concentration Breathing.

Maintaining Total Concentration Breathing was inherently challenging, not only due to physical exhaustion but also because it required intense mental focus.

Eventually, Obito put the stone down after five and a half minutes, while Shisui, having chosen the smallest stone, lasted five minutes before putting it down.

"You maintained Total Concentration Breathing for five and a half minutes. See, you can actually persist longer than you thought," Mutsuki praised with a smile.

Obito's fatigue instantly vanished, and he grinned sheepishly. Mutsuki always managed to provide timely positive feedback.

"Shisui, you did very well too. You're a bit younger, so it's a bit harder for you," Mutsuki said, patting Shisui's head reassuringly.

A faint smile appeared on Shisui's face.

Mutsuki didn't give them the chance to waste time. After three minutes, he had them enter the Breathing Technique state again, maximizing the power they could exert.

"Next is running. Continue until you can't maintain the Breathing Technique anymore," Mutsuki instructed.

The purpose of Constant training is to make the body remember the Breathing Technique, so that one can maintain Total Concentration Breathing all day, even subconsciously while sleeping.

Therefore, the intensity of Constant training is particularly high, far beyond the Beginner stage.

Thanks to Mutsuki's secret training medicine, this won't harm them, otherwise, he might have slowed down the training. This intensity was even greater than Guy's previous regimen.

By the end of the training, Obito's legs were weak, his head was spinning, and he could barely distinguish directions. He felt as if his body no longer belonged to him, as if his soul could drift up to the sky at any moment.

"So tired," Obito exclaimed sincerely.

He felt that his previous training sessions were nothing compared to today. He had lost count of how many times he used Total Concentration Breathing and couldn't even tell if he was using normal breathing or Total Concentration Breathing by the end.

Running, weighted squats, weighted push-ups, and other basic exercises became incredibly exhausting when combined with maintaining Total Concentration Breathing.

Even Shisui couldn't keep his composed expression; his face was full of fatigue.

Mutsuki smiled faintly without saying a word. This was nothing; it was just basic training. There were more intense training sessions to come.

"That's it for today. I need to adjust my schedule"

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