What endurance sport has taught me about business

This essay hasn't been written yet. Below is the working premise and the questions it will try to answer.

The premise

Marathons and long rides reward the same things long enterprise cycles do: honest pacing, consistent preparation, and staying composed when the middle gets hard.

Questions I want to answer

1. 1.Why does pacing matter more than speed?
2. 2.What does training discipline look like at work?
3. 3.How do you stay composed in the long middle of anything?