Why does intense exercise make me taste blood?

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Ace

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Why does intense exercise make me taste blood?
« on: 10/12/2009 10:30:03 »
Ace asked the Naked Scientists:
   
hello naked scientists!

This is ace, phd student in the US and amateur triathlete.

I am a big fan of your podcast which i listen to, religiously, on a daily basis (and i love your british accents ;-)).

So, I have a sport/physiology related question:

Why is it that, when i run between 90-100% of my VO2max, i have a strange taste of blood at the end, and i often start coughing?

When this happened I spit but there is no blood, just the taste of blood and i start to cough. Note that I have no medical problem and i am in excellent health condition.

thanks very much and thumbs up on your show!
ace

What do you think?

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Offline Chemistry4me

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Why does intense exercise make me taste blood?
« Reply #1 on: 10/12/2009 10:51:32 »
Hi Ace, I have experienced this too, it's definitely weird...

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Offline Chemistry4me

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Why does intense exercise make me taste blood?
« Reply #2 on: 10/12/2009 10:54:12 »
I've done a quick search and you might be interested to see what these fellows have to say:

http://ask.metafilter.com/50073/Why-do-I-sometimes-taste-blood-when-I-exercise-strenuously

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Offline acekyle

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Why does intense exercise make me taste blood?
« Reply #3 on: 13/12/2009 21:23:05 »
thanks for the info! looks like there are many "theories" outta there. i also heard from some friends who do track that this happens when the air is dry and that this latter might cause the blood capillaries in the throat to burst ( [???])...
anyways... i am egging for the NS's science-backed answer and explanation.