How long is too long for a long ride?

[Ivegotabike]

I wonder how much of your own data is needed to do something like Kristen Faulkner does?

Training plan volumes for female riders

Kristen Faulkner has been across cycling media in the last week or so based on this linkedin post Quote from it to whet the appetite? “I used this to help me prepare for the Pan Am Championships, where I won 3 gold medals this year. Today, I produced my best 20-minute power ever with training help from this app.”