Trail Zealot wrote:
I wonder if cyclists are just more used to variable power output than runners. For no reason other than...that's how it is.
It's because of how racing works. In running, the value of being with "the front group" is negligible and the only reason to care about where your competitors are is psychological. There's no reason to surge at mile 14 of a marathon to split the group.
In cycling, the drafting is a huge component of the race - imagine running into a 30mph headwind vs running with no wind. In a cycling race, teams will intentionally attack on big climbs or in sections of crosswinds or narrow winding roads or whatever opportunity to split the group they can get, because it's essentially impossible for a lone rider, no matter how strong, to catch up to a group drafting together.
Unlike running, it's literally critical to your racing potential to be able to attack / respond to an attack in the middle of a race and then keep going, so for a cyclist, having a hard effort sprint in the middle of a long ride is actually realistic race simulation.