It is mentioned in various podcasts, not sure they will be easy to find as they come up as sides to particular discussion.
Short story from my memory:
- Nate started taking indoor cycling classes from Chad, in Reno at his studio (Indoor Power? or something like that).
- Nate loved the classes and got faster, but was looking to save money. So he decided to write an app to run cycling workouts.
- Nate wrote the app on the side while still at his regular programming gig (IGT, a Fortune 500 slot machine company). He buried himself in it so much that he effectively bailed on training.
- At some point (not sure when) Nate decided that he needed workouts and training plans for the app, and joined forces with Chad.
There is an early post on DCRainmaker’s site that is around the original release time.