What counts as a fasted ride?

[GravelNut]

A few questions about fasting rides (fasted training)

I like to incorporate 3-4 fasting rides a month into my schedule. I normally do them over the weekend before breakfast. Currently I do them outdoors but with the days getting shorter I will probably switch to indoor so that I can utilize the weekends for longer rides. I have a few questions: 1- are fasting rides worth the effort? I’m currently 180cm and 75.3kg. I’d like to get my weight down to 67-70kg (my race weight in high school was 59kg). 2- In terms of effort what should I be aiming for?…