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If you are riding near your aerobic limit you'll definitely discover that you've lost aerobic capacity during the next 12-24 hours. It can take that long to replace the red blood cells you've lost. Since a blood donation is about 10% of your blood capacity, your aerobic capacity will be down by 10% I wrote the rest of this before I saw your comment that ...


6

Depends on exercise intensity. In a day or two you can return to your normal/moderate exercise. A complete recovery of oxygen delivery can take as much as 3/4 weeks. This means a professional athlete should be careful because he will loose performance, but us normal human beings can carry our normal daily lives. You can read more complete answerers given ...


2

Yes, it will affect you, but I doubt you'll notice the difference. Some people do feel fait afterwards, but I believe this is related to blood pressure rather than red blood cell count and your body can replace the fluid relatively quickly, so have a cup of tea and a chat before you leave and you should be ok. When I was giving regularly, they asked if you ...


1

I used to cycle 8 miles each way on my way into central London, before I moved. I also used to give blood before moving to a country where they prefer not to accept mad cow blood. So there you go. I found that on a good day I used to be able to cycle into work in about 40-45min. I also found that the days immediately after a donation I would take ...



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