In striking, Rory Miller (Meditations on Violence) notes, power generation varies by range:
This is why it is so hard to do serious damage with strikes in a real fight — you rarely are in complete control of the range. Clavicles and ribs can be broken fairly easily, but aren’t broken often. In the same way, strikes to the brainstem (and the associated high-percentage areas) should be easy, but they don’t happen very often.Following this yet? To be a successful striker you need to put power in a specific place. That is much easier when the target holds still. The great strikers (I’m thinking sport, here) are not just putting the fist or foot in the right place when it is at the max on the power curve; they are also manipulating the opponent to be at the right place at the right time: personal precision plus the remote control precision on an opponent. That’s cool.
The jujutsu solution, of course, is just to hold them in the right place.