[He's not very picky when it comes to food, perhaps surprisingly for his age, but when you live in the wilds with a half-Saiyan to train stuff up, you learn to take what you can get.]

By training... normally, I guess? It's a part of you, so if your body gets stronger then you'll get stronger in general. My friends and I practiced martial arts and fighting and stuff like that, and it trained it up! But you can also use the ki you have to train it too, especially for control.

[Munch munch.]

I'hm nhot rheally shure how to esplahn khi chontrul though.