Originally Posted by
GhostRider62
yes. Some coaches say that. Nothing more than 6 hour training rides. No very long training rides. I have heard it directly and have read it.
Back before RUSA, it was pretty common to have night starts with 400 and 600K. The good thing is you are learning about night riding when relatively fresh since it is the beginning and not the end of the ride.
A
source I trust says it's true that training longer than 6 hours is a bad idea from a purely physiological point of view, but that experiential learning is also very important. Once one has a lot of experience on ultras, the downsides of training long distance may outweigh the upsides.