"So what were you both thinking, fighting in class like some drunk idiots.
You guys are ninjas in making, atleast use taijutsu instead of rolling on ground, embracing each other"
At teacher's word both looked almost ashamed.
"Now I want you both to run 20 laps around training ground"
"But mina sensei I wa-"
"On your hand "mina sensei cut off sato 's words with a smile on his face and looked at mirai with expectation.
Do you also want to me complaint so you can add more punishment, you sure are enjoying yourself.
"Hai sensei "
With that he simply went to the training ground without waiting for sato.
He decided,he would treat this punishment as a training session. At least might guy would be proud be proud.
After finishing his training session, he went home. Even after his little training session, he wasn't out of breadth. He started conditioning his body since he was 6 years old, so this wasn't something new for him. His physical training session wasn't as tough as might guy, but he was persistent.
He challenged his limits gradually, when he was started training, he couldn't do 10 push-ups and sit-ups but he persisted. After week of training he could do 11 push-ups and 20 sit-ups. That same thing happened when he started cardio. He was slowly and steadily increasing his limits and challenging them. Even his father was worried at beginning, as a traditional yamanaka he wasn't keen on physical training. Not just yamanaka but many ninja clans don't start training physically their children.
It was understandable, a life of ninja is very tough. When a ninja starts his career, even if isn't physical trained,the circumstances and needs of different and mission and constant threats make them resilient. Their physical conditioning and stamina increases leps and bounds. That's why most ninja clans start teaching children about chakra theory and clan's secret techniques.
When it comes to ninja , the most important thing is chakra and ninjutsu and there's no denying it . Even might guy needs chakra for his forbidden jutsu, and without chakra no ninja can train his physique to superhuman level. That's why most ninja clans focus on ninjutsu, because eventually you are going to get physically tough, ninjas sure can take beating.
May be jiraya was right , a ninja is someone who can endure anything.
So by training early, mirai hoped to shorten the gap between him and a ninja who had endured tough situations of war and missions, even if the gap is just in physique.
He wants to become a ninja who is proficient in close combat and ninjutsu. But most of his time spend on researching new ways to use mind related jutsu.
All this training made him stronger then rest of his class but no one knows how strong. Because in his class ,there are no exceptional students , so he doesn't have to put much effort in Winning taijutsu duels.
He can be regarded a top students but that's it, and his communication skills doesn't help either. He can't communicate well with children's and his eccentric and somewhat narcissistic behaviour creates more barrier. It's not like he is total loner, he just doesn't have someone he can call friend. Sato doesn't count he is busybody he can start conversation with anyone and he is even friends with seniors, a total busybody.