I will be running the NYC Marathon this year....my first ever. I really only began running a year ago, so this is all still pretty new to me, but I'm getting ready to run my 7th Half Marathon next month. Here is my question. I realize that I will have to bump up my weekly mileage as well as my long run distances in order to prepare. As of now, I have no problem with doing a ten mile run every week or so as part of my training. Most beginner marathon programs I've looked at begin with much shorter distances in the early weeks and gradually build up. Do I have to scale all the way down when I first begin my official training, or san I start from where I am now? I'm afraid if. Scale too far back I'll lose whatever progress I've made so far.
You don't have to backtrack. It may mean that in the early weeks of the plan you will be doing more miles than the plan calls for but that's OK as long as the "more" is typical of what you're doing now.