Garbage feeling in all of you or just in your legs? Regardless of whether after a rest day or not, quite often my legs don't feel good on any ride during the first 60 minutes of riding. However my numbers and data for that ride don't show any evidence of my performance being bad during that period my legs feel crappy compared to when they feel good.
However the garbage feeling I might have for all of me that sometimes makes me resist going for a ride goes away almost immediately when I get on the bike and begin to pedal!