True powerhouses generally did not worry about their chakra reserves. Even if they were not born with an exceptionally large amount of chakra, they would always find some way to solve the problem.
Tsunade's Strength of a Hundred Seal and Yin Seal were the two most typical examples. The Strength of a Hundred Seal was not itself a ninjutsu for storing chakra, but merely a means of regulating chakra. It could greatly conserve chakra in everyday life, and in battle, it could work with the chakra-storing Yin Seal to unleash tremendous power.
Unfortunately, Mizuki knew neither. Not to mention a ninjutsu like the Strength of a Hundred Seal, which came with the equivalent of a chakra-consumption-reduction aura—even a sealing technique like the Yin Seal had yet to be completed, much less Tsunade's unique secret techniques such as Creation Rebirth and monstrous strength.
This was not because Mizuki's sealing techniques or chakra control were inferior to Tsunade's. When it came to chakra control at the cellular level, Mizuki believed that few people in this world could do it better than him. The key was that he did not possess Tsunade's outstanding medical ninjutsu skill, nor could he apply medical ninjutsu throughout his body and perfectly integrate it as she did.
"Can sealing techniques do this too?" Sakura asked.
Sakura was also aware of her innate shortcomings. Generally speaking, female ninja were physically weaker than male ninja of the same age. That was a physiological difference, and there was nothing to be done about it.
Moreover, Sakura was only twelve years old and still growing. A body that had not fully developed simply could not refine much chakra.
Why were battles between genin so boring? Because of the limitations of their bodies and chakra, after one or two ninjutsu, their chakra was