Dear Rwers,
This is a slightly strange request.
And please say so if no-one understands what I am going on about.
After a hard run - usually of over 4 or 5 miles at least when I finish I get a taste in my mouth or a smell in my nose - I think it might be a combination of the two. It is not nasty although it is kind of metallic and my wife claims she can smell it on me (and she says it is not nasty!). I, of course, associate it with running well and hard (for me) and putting the effort in SO it is associated with achievement and relative success. Am I imagining it or is it (as my brother says - an enzyme which is released). I wondered about "Fat-burning" or VO2 max stress or even some kind of Ketosis (a la the Atkins diet). I don't suppose out there there is a running microbiologist who might be able to help and has experienced this themselves.
I hope I am not alone, or it is a sign my body is about to collapse. I get this taste/smell a lot. It is not a recent thing. I like it.
Weird but perfumed in Sheffield.
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Unperfumed from Kent ;-)
On the other hand that may be complete garbage
there are a number of bacterial conditions that can lead to all sorts of brath smells - some of them metallic smelling........these could be related to poodr dental hygiene (food still around teeth) or some internal problem......with hard exercise you are taking in more oxygen which may be allowing more rapid breakdown of whatever by the bacteria.......
metallic tastes often relate to sulphr containing compounds produced as a result of bacterial breakdown........mercaptans etc......
you could be advised talking to a dentist.........Crashie?? where are you???
Can't add a lot to what fb has very succinctly said...
I'd be thinking slight dehydration plus mouth-breathing plus gingivitis (plus a spot of post nasal drip...you can always throw a bit of snot into the equation) leading to a metallic taste and smell.
Try the old staples of brushing twice a day for two minutes a time, especially where the teeth and gums meet, flossing with a PTFE tape, rinsing with a chlorhexidine mouthwash after brushing (at night); stay hydrated and see if it goes away...
I would always recommend a dentist/hygienist visit too, but then I would say that, wouldn't I? )
;O))
After my long runs (1 1/2 hours or more at slowish pace) I can smell the acetone smell. I understand it to be the body burning protein which apparently means I've run out of glycogen on my long run and started burning muscles (help!!). I drink about 1/2 litre of sport drink on the way round. Strangely enough, despite running faster and longer on a marathon, I've never been aware of the acetone smell at the end.
Do we have a micro-biologist to give advice?
converting protein to glucose (gluconeogenesis) is generally a very slow reaction and is usually only seen in cases of severe malnutrition to any great extent......
converting fat to glucose is a much more efficient mechanism.......and is used in preference to suing protein when glycogen has become depleted......