I donated Blood Wednesday (got my 17 gallon pin) and rode my usual commute (14 miles one way) today. First time I tried to ride to work the day after donating. Don't know if THAT was the main factor I got tired early into the ride or the 12-15 headwind. Probably a little of both, PM ride home was alot better, but I did take it kinda easy. Anyone else here a regular blood donor????