I’ve been guilty of this… it was my last long ride before Ironman South Africa last year, my wife was driving to visit some friends a good distance away and I reckoned I’d be finished before she got there. I just lost the bet
It was basically a long easy ride as I felt the real build up to the race had been done and was filling time! Plenty of water bottles, a couple of flapjacks and a couple of gels, job done. A bit of TV, music and podcasts filled the time.
In fairness it was much easier than some of the sessions I had done in previous weeks. I created a series of progressively harder rides based on Mount Bond. This was my long ride the week before Bandeira
This, at 0.76 IF, was a much harder ride than Bandeira though not as long. I’m able to watch TV for the first couple of hours before moving on to AH.FM for the remainder. Nothing like a bit of loud trance music to get through a session.
That day I did what Joe Friel termed big day training to validate my IM pacing and strategy. 38x100m in the pool off 10 seconds rest at 7am, home for a light breakfast, the ride above followed by a recovery drink and an hour after that I ran a steady half marathon at projected IM run pace in 1:37. A good days training that was
A good number of people have though, possibly understandably, I’m utterly mad by riding long on the trainer but they really are effective sessions if you can stand them and I’ve seen some progressively good results, both in Ironman and long distance TT’s off the back of them.
Keys as @mcneese.chad said are good entertainment of various sorts, good planning around nutrition and hydration, the mindset that they are hard but have good rewards and a good quality chamois cream