I went to give blood for the first time yesterday, they encouraged me to ask as many questions as I pleased so I enquired about the ramifications of giving blood with training (As it is the start of the mara/ultrathon season!),
Once I explained my training program (Its quite severe at the moment as I have a few ultra's in the coming months) they deterred me from giving blood (They wasnt happy about me running for the next few days let alone that evening!).
I was just wondering if anyone gives blood & what effect this has on their training/racing ability? This is a little more specified to the longer distances, ie ultras/more difficult marathon runners out there?