There are other movements you can do such as a one inch side kick if you are able to use a pendulum motion well. But if your foot is only one inch away, then your opponent is going to be standing in punching range and therefore is going to be trying to land some bombs in your face, much better to be worrying about punching him at this point rather than putting power into a low kick.
The one inch elbow or even shoulder may serve a purpose (these would use the same technique as the punching version), but probably not very often. You have to think about what would be better to do in certain situations.
_________________________
Sticks n stones'll break my bones, but if I land the first one, you're in trouble!