Morning ride...no zip at all

Rode early today...no real breakfast. Felt really bad for most of the 17 miles I struggled through. I was able to hit a cruising speed of 23mph for about a mile but my stomach was upset and my legs were stiff and lacked any real strenghth. I called it after I ate a snack that had very little effect. There was some wind which didn't help, but mostly I was not peppy. On the bright side it was a georgeous day and I passed numerous fit looking riders without feeling good at all. The new rear wheel cover performed perfectly.