I am training for a 10K run at the end of October. I have been doing the whole 6.2 miles on Sundays.
The day before, is my schedule rest day.
I am getting better. When I first started this, at the beginning of August, I was exhausted after the Sunday runs and usually ended up taking a nap Sunday afternoons. Now not so much.
I definately thinking resting or Active Recovery is the way to go beforehand if you are not used to that distance.