The afternoon passed quickly.
"Alright, break's over. Everyone up!"
Sun Mo jumped straight off the hammock, and Krillin rubbed his face as he woke up.
Goku, meanwhile, stretched hugely, loosening up his body.
"Ah! A midday nap feels great!"
Master Roshi chuckled. "Of course. Our bodies need proper recovery to be trained even better."
"I see, got it!" Goku replied with a grin.
Sun Mo listened to their exchange, lost in thought.
So this was what they meant by balancing work and rest, tension and release?
But in his view, the training intensity was still too low—it was like training without training at all.
He only felt relaxation, not much strain.
He figured the lack of sufficient weight meant the improvement was negligible, almost nonexistent.
"Alright, our afternoon training task is road repair—
another form of training that builds the body and earns money at the same time.
But unlike plowing fields, you'll push wheelbarrows loaded with stone. And you have to be fast..."
The three nodded in unison. "Yes!"
Master Roshi started off at a jog, and the three hurried after him.
Soon, they jogged all the way to the construction site.
The jog was just a warm-up; the real work was the main event. Master Roshi laid out their tasks clearly.
The three pushed wheelbarrows piled high with stone, racing down the road.
They were so fast they were even more efficient than a dump truck.
The excavator operator stared in awe.
"Faster than a car—those kids have some serious strength!"
Master Roshi chatted with the workers while urging them on.
"Hurry up, Krillin, don't slack off. You're one load behind."
The sun set, and the day's roadwork was done.
Master Roshi led the three to the seaside.
"After working up a good sweat, next up is swimming training."
Krillin spotted a triangular fin cutting through the water—a shark's fin—and broke out in a cold sweat.
"Ah, we have to swim to escape sharks too..."
Goku frowned a little. He'd already trained in this under his grandfather.
He said reluctantly, "Teacher, what's the point of this?
Teach us real skills—I want to learn powerful techniques!"
"Yeah, yeah, I want to learn techniques too!" Krillin added.
Sun Mo knew Master Roshi had plenty of techniques but never taught any of them, so he stayed quiet.
He understood Master Roshi must have his reasons.
Sure enough, when Master Roshi saw both Krillin and Goku eager for techniques, his expression turned stern.
He spat, "Hah! Talking big like that!
If you haven't even built up your stamina, there's no way you can learn real martial arts!"
The two hung their heads in shame.
Sun Mo pointed at the turtle shell on his back and said, "Teacher, can I swap this turtle shell for another one?"
Master Roshi raised an eyebrow, looking at the shell on Sun Mo's back.
He thought Sun Mo, like Krillin, was finding the weight too heavy.
He said earnestly, "Your turtle shell is heavier than Krillin's and Goku's, sure, but you have a better foundation. Too light and it'd be useless.
The weight of each shell on your backs was carefully calculated by me—
just enough to push you to your current limits without straining your bones or affecting later training."
Krillin, overhearing this, secretly felt relieved. "I knew it—his shell is twice as heavy as mine.
Other training is fine, but in the water, there's no way he'll last..."
However, Sun Mo shook his head and said, "Teacher, you misunderstand. I think this turtle shell is too light.
I barely felt tired during today's training...
The sweat from fixing the road was just because of the heat."
"What?"
Krillin's eyes went wide.
This guy thought it was too light?
Krillin faintly felt his own shoulders aching.
"This world really has no limits.
I thought coming here with my skills already put me ahead of everyone else, but I didn't expect him and Goku to be this fierce... I'm struggling just to keep up."
Master Roshi's eyes narrowed slightly behind his sunglasses.
Sun Mo's turtle shell was already far heavier than what an ordinary person could handle, set according to the astonishing qualities he'd shown at the start.
And now, on the second day, he was saying it was too light?
Looking at Sun Mo's calm, steady breathing, it really didn't seem like he was forcing it.
Instead, it seemed... effortless.
"This kid's physical potential and adaptability are even more exaggerated than I thought.
Tch, I still underestimated him."
Master Roshi suppressed the turmoil in his heart, keeping his face neutral as he said, "Oh? Too light?
Looks like I underestimated your foundation.
But increasing the weight isn't a small matter. The training ahead is grueling.
I need to make sure your body can really handle it."
He took off the turtle shell from his own back.
It looked a size bigger and much thicker than the one on Sun Mo.
"Try this one!
Next up is swimming. I don't recommend you wear a turtle shell for this.
Because the density of the human body and water is about the same.
But carrying a heavy turtle shell in the water means you'll need more than ten times the effort to swim at the same speed.
If you can keep up with Goku and Krillin's pace while wearing it, swimming two laps to dodge the sharks, I'll agree to let you use it for training from now on."
Sun Mo thought for a moment, then said, "I'll give it a try!"
Master Roshi nodded. "Give it a try!"
As a teacher, he wanted to get a deeper read on Sun Mo's limits.
Sun Mo switched to the new turtle shell, moved around a bit, and said, "This feels about right."
But his movements were still unimpeded, light as a swallow.
He felt that on land, just like Goku and Krillin, he should have no problem in the water.
Krillin stared at Sun Mo in shock, swallowing hard.
Even though they were doing weighted training, he and Goku couldn't wear turtle shells in the water.
Like the teacher said, the shell was too heavy—when he secretly tried it, he sank straight to the bottom.
Luckily, he hadn't gone too deep and managed to walk back to shore from the bottom.
Only a beast like Sun Mo could swim with them while carrying that small shell.
And after just one day of training, he wanted to add more weight?
Krillin couldn't help grumbling inwardly: Sun Mo, you're way too intense, man. You're making it hard for me and Goku!
What if the teacher thinks we're all too comfortable and adds weight for us too?
After strapping on the new turtle shell, Sun Mo jumped straight into the water.
"Splash!"
Sun Mo sank to the bottom without any surprise.
Goku, Krillin, and Master Roshi stared at the water's surface, barely daring to breathe.
A few seconds later, a few bubbles rose, but Sun Mo didn't surface.
After a moment, Krillin scratched his head and said, "Why hasn't Sun Mo come up yet? He's not drowning, is he?"
Feeling the time was getting dangerous, Master Roshi suddenly ran toward the water, shouting, "Krillin, Goku, come help me fish him out..."
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