I find the hour record (on an indoor track, with specific standards for the kind of equipment allowed) to be particularly interesting.

One thing required by the rules for this record is that the rider cannot see any data during the attempt. No speed, distance, time, etc. They say “go” and start timing, then after one hour they say “you’re done” and note how far you went. You can’t be coached along the way or receive feedback of any kind. So you need a great deal of discipline to manage your pace or effort.