Thread: Donating blood
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Old 06-11-08, 01:55 PM
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SSP
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It takes your body about 8 weeks to replace all those red blood cells. But, as long as you hydrate well, you can probably go out and ride hard after a day or two...you just won't be as fast.

FWIW, that's one reason I typically only donate blood around Thanksgiving and New Year's - there's generally few races or hard rides on my calendar then.
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