One of the things I also saw on that web site was the suggestion that cardio workouts be 30-45 minutes a day, and starting at 130-140 BPM heart rate.
Think about that. I could certainly do that before breakfast. That's a slow ride on a road bike, like 10-12 MPH maybe, so we're talking about like a 5-8 miles? Why bother? It might be a good fat loss workout, but it's not much of a cycling workout. With that view, maybe it would be a worthwhile addition just to burn some extra fat, but it's not going to do a lot for you as a cyclist for most of us I think.
__________________
Tom
"It hurts so good..."