Message board topics
Reply Create A New Topic Subscribe to this Discussion
8/9/18 8:32 A

My SparkPage
Send Private Message
I don't think you can assume you have the same amount of blood as before (yet).

I am a passionate cyclist and use both a power meter and HRM, so I can compare both input and output to keep a pretty close eye on my fitness levels. In early July, I donated blood (one unit), and it is only this week (ie. 4 weeks later) that my cardio performance is back to where it was pre-donation. Part of this is loss of blood, and part of this is dropping a bit of fitness due to not being able to do much in terms of high intensity workouts for about 3 weeks.

My understanding is that fluid volume is back to normal levels within a couple of hours of blood loss, that blood plasma is back to normal within a couple of days, but that rebuilding red blood cell stocks (which is the part of the blood that actually carries oxygen) takes 2-4 weeks. Rebuilding iron reserves takes months (although that will not really affect cardio performance).

While they may have given you 12 units of blood, that doesn't mean they have fully replaced what you lost. Your body is probably still having to rebuild its red blood cell count on its own. What you are experiencing in terms of cardio performance is not surprising.

Edited by: MOTIVATED@LAST at: 8/9/2018 (08:36)
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

 current weight: 183.0 
8/6/18 4:04 P

SparkPeople Team Member

My SparkPage
Send Private Message
It's hard to say if that's exactly why and I would also suggest discussing it with your doctor. It could be due to the initial emergency/issue that you went in for or it could be something with the blood transfusion or a variety of other reasons. Either way, it would be a good idea to at least give your doctor a call and mention this just in case it is related to your recent emergency issue.

Also, make sure you are cleared by your doctor to be exercising and ask if there are any certain limitations for you.

Coach Denise

Edited by: SP_COACH_DENISE at: 8/6/2018 (16:04)
"Obstacles don't have to stop you. If you run into a wall, don't turn around and give up. Figure out how to climb it, go through it, or work around it." - Michael Jordan

Searching for a buddy? Try using the search feature in the SparkPages section.
8/6/18 3:51 P

My SparkPage
Send Private Message
I agree that you should be talking with your doctor.....

Also, please remember that this isn't only about what your hemoglobin is currently. Whatever caused the internal bleeding to that extent still is only 3 weeks into its own healing... That isn't very much time really. Plus with that sort of blood loss, your body will have released its own reserves of blood cells, and used iron reserves. It takes definite time to replenish those.

Your doctor would be the one to give you the best advice as well as run labs to double check that there aren't any on going issues. In the meantime, I would definitely cut back the cardio. Listen to your body...and seek professional advice!
all the best,

"The only thing we have to decide is what to do with the time that is given to us."
Gandalf: Lord of the Rings

 current weight: 140.0 
SHOAPIE's Photo SHOAPIE Posts: 25,148
8/6/18 10:57 A

My SparkPage
Send Private Message
It can takes months to return to “normal” after major blood loss.

 Pounds lost: 7.3 
MLAN613 Posts: 20,466
8/6/18 6:43 A

My SparkPage
Send Private Message
Honestly, you should probably discuss your concerns with your physician, especially since you recently had an emergency event.

Meghan in Minneapolis, Minnesota, USA

 December Minutes: 1,373
LIGHTANDLETHAL SparkPoints: (12)
Fitness Minutes: (0)
Posts: 4
8/5/18 11:12 P

My SparkPage
Send Private Message
Hello! I just joined SparkPeople tonight. I'm a middle aged male with an above average fitness level, below average body fat percentage and no long term health problems or medications (but this could change soon, I'll find out in September). I say this as a point of reference concerning my question.

Anyway a couple of weeks ago I had an emergency blood transfusion of at least 12 units for massive internal bleeding - long story short, but bottom line when I arrived at the ER my hemoglobin level was 3 out of an optimal 12 because I lost about 1/3 of my blood.

It might be psychological, but during the cardio portion of my exercise (using an inclined treadmill at my gym) my performance is nowhere near as good as it was prior to the transfusion! I can't burn nearly as many calories-per-minute as I could, and tire much sooner too. Obviously I have the same amount of blood as I used to have and the blood they gave me was screened and safe. Is it all in my head or does it take some time for my hemoglobin level to be 100 percent back up to normal? I am under a lot of stress lately (long story but trust me I'm stressed) so maybe that's a factor, I don't know. The strength portion of my exercise routine consisting of resistance training has not been affected. Any thoughts?

Page: 1 of (1)  

Report Inappropriate Post

Other Fitness and Exercise Topics:

Last Post:
7/17/2018 10:54:42 AM
1/11/2018 10:44:00 AM
7/24/2018 5:35:13 PM
5/24/2018 8:06:09 PM
3/15/2018 7:05:24 PM

Thread URL:

Review our Community Guidelines