I'm a big fan of Joe Friel's training philosophy and plans - seems to work well with my adaptation, etc.. I have used him off and on and the years I used his plans, had great performances. I used his Intermediate Half plan for my first half ever after only 1 year or so in tris and did 5:01. I am using his plan for IM Louisville and the training has been going well and I have also had some of my best sprint and Oly finishes (probably given the HUGE base I have now).
On Joe's blog, he mentioned doing a "big day" 2 times during the final 12 weeks. Once at 10 weeks out (this weekend) followed by RR week and then once a little closer to the beginning of the taper. The big day consists of the following: Wake up the same as you will on race day 2 to 3 hours before and have a big meal. Then, 1 Hour swim (OW if possible). Rest 90 minutes with light calories and legs up. Next, ride for 5 hours. Then another 90 minutes rest. Finally run 2 hours.
His rationale is that you will be "focusing on training" for 11 to 14 hours (if you include the early morning nutrition) and will be physically training for 8 hours. It’s supposed to be a good gauge of not only your fitness but your mental focus.
I am considering doing it this weekend. Otherwise my weekend would be Saturday 2:30 run and 1:15 swim and Sunday 5:30 bike with 15 minute run. Ideally, I would like to do a half sometime in the next month or so, but I cannot find one that fits my schedule .... would like to know what others think about the idea of a "big day" during training.