Missing the obvious

[isle_of_woman]

I wondered why my workout today was so tough. I had *no* gas for a workout that earlier in the week was no problem. I kept having to stop, like I'd been running for miles. After I got home, I was talking about how lousy I was feeling then James pointed out, "You gave blood yesterday." Oh. Yeah. Geez. I had forgotten!

I guess I did the opposite of blood doping! Live and learn ... Hopefully things will be better next workout. I wonder how long I should've waited?