So I just went and donated blood again and durring the recovery period it occured to me that it takes quite a bit of work for your body to regenerate that lost blood volume and the actual blood cells. Regrowing that many cells seems like it would be fairly energetically intensive. So how many calories does producing all those new blood cells actually consume? Is there even a way to know that?
Oh man, instead of my daily workout, I could just donate daily! After a few months, I’d be a blood making machine!
If you’re however old you are now and still not a blood making machine, I’d say see a doctor.
As a chronically anemic person, I need other people’s blood making machines.
Go donate if you can! I will take your sweet, sweet red blood cells.
I’m at nearly 50 donations (each 0.5L) of sweet sweet O+. Apparently, my blood is really good for children since I’ve never contracted some specific disease.
That would be CMV. Newborn babies and pregnant women and cancer kids need CMV-negative blood (if they need a blood transfusion). Thank you for donating.
I’m O+. We should be friends!
The number floating around the web is 650 calories but I haven’t been able to track down the actual source.
(Google Scholar is no help at all. Whoever these UCSD researchers are, I have no bloody clue.)
So I can shotgun two pints of beer after a donation (gotta rehydrate!) and still be a couple hundred calories ahead? Win-win!
And you’ll get drunker due to the blood loss!
brb, donating blood
Hmm. Not as much as I hoped. You could probably eat that many calories in the free snacks they have afterwords without anyone even looking at you funny.
There is no good way to outpace calorie consumption with activity. It is far far easier for humans to consume usable calories than it is for us to spend them.
In our ancestors this meant that we were able to go a long time between good meals during times of scarcity and still survive, but today it just means that if you’re worried about calories you should start in the kitchen, not the gym
It’s something you’ll never truly figure out and can’t really as your body is a constant state of maintenance. When my brother was rushed to the hospital with pneumonia, the next day he didn’t really grow a beard. Makes sense. When you’re at deaths door, maybe don’t worry about growing hair.
Your body is always managing resources.
Basically it’s going to take the energy needed from other maintenance items (hair, nails, skin, etc.) and devote them to blood manufacturing. It’s also going to cut your energy to save calories so you’ll feel pretty sluggish for a bit.
How we currently deal with calories is just wildly misleading.
I dunno. I usually give platelets.
