Board Thread:Theories and Speculation/@comment-27083521-20161018125702/@comment-25122992-20161018130852

Well, it seems like the Hyuga members inject chakra into their opponent not just through the hand, but rather through their fingers because they aim for tenketsu (which are quite small), so to pinpoint them accurately, they need a small but precise hit. Such a thing can't be done with larger parts of the body, unless some Hyuga have an ability to control their toes as good as the fingers... I don't say it's impossible, but Hyuga's battlestyle relies on these small accurate hits, and if they'd try to perform this hits with the entire foot, for example, there's a significant chance they would miss the tenketsu and the chakra volume they expelled from the entire foot would get wasted.