I've always read it as physical and mental energy because I remember thinking about how different Naruto!energy is with Yu Yu Hakusho!energy, because in Yu Yu Hakusho deals with energy of the spirit (evidenced by the increase in powers even when the spirit is severed from the body.)
As Sakura explained, it the the result of a harmony between the mind and the body. That is why strenthening the body as well as honing the mind and will result in increase of the chakra.
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Date: 2006-03-15 06:05 pm (UTC)As Sakura explained, it the the result of a harmony between the mind and the body. That is why strenthening the body as well as honing the mind and will result in increase of the chakra.