Originally Posted by
Duke of Kent
Almost all due to the rider overheating.
The reason for my initial question was actually due to seeing you post about overheating in the "Training Status" thread. I'm surprised that there is an effect even with only a 20 minute test (plus 20 minute warmup I guess).
I think I will do both within a week or two of each other just to have an idea of how much power I lose on the trainer. In terms of boredom, good music goes a long way in keeping me motivated. We'll see what I think after a month or two, though.