Join Date: Oct 2013
Location: Roanoke, Va
Bikes: 2013 leader 721. 2015 leader 725. 2012 fuji feather
I really think you shouldn't have to spend a lot of time planning out a template for a 40 mile ride. Overthinking things tends to make them suck.
As long as you don't go from 0 miles to 100 miles in a week, you should be okay. Get enough rest and take ibuprofen if you have to.
Get out on the weekends and log 20, 25, 30, etc building up a bit each week. Over the winter a lot of people only get 1-2 days on the road, but doing 30 miles on a Saturday isn't a big deal. Just ramp up the mileage by 5 a week and you should be doing 40 comfortably by the time the ride gets here.