Freddie Rodriguez instructs the following:
Fat Burning Ride - Fast Recommended (2 Credits)
Pro cyclists and other endurance athletes train at low-to-moderate intensity while in a fasted state regularly to: allow their bodies time to recover from higher intensity sessions and train their muscles to better utilize fat as fuel. Better fat utilization can enhance athletic performance in endurance events and can also help you become leaner.
Experience the gentle rhythms of riding at low-to-moderate intensity while learning a bit about the underlying science. For best results, you'll want to do your low-to-moderate intensity training while in a fasted state. So wake up, have a nice drink of water and come on in. If you have a heart rate monitor, please bring it with you.