If you do that, your brain will benefit from its (life-long!) property of plasticity and will create new neural connections (with each repetition) which favor the action you're about to execute:
First, you're about to create a new path (like through a thick a forest), which is a bit harder, but then you use that path again and again, and the path will become a street and then a highway (which is increasingly easier to use). In the end, you can execute your action without any effort because your neurological pathways are now really solid and the electrical signals travel much easier.