First I try three notes per click, then four, then five, until I get to eight. Coordination in small groups, that s what I work on. You have to push your borders, and don t accept it when it gets sloppy. And you have to come up with new exercises so you don t get bored. There are other things to work on too.
Some people use too many big muscles.
They re never going to get that fast. The little muscles in the hand are much more adept at speed. The idea is to use the bounce in your muscles. As the muscle pulls the finger in, it then has to let go, otherwise you have to push it out, and that slows you down considerably. If you shake hands with people like Yamashita, their hands are all rubbery.