General Discussion Triathlon Talk » While we're all thinking about electrolytes... Rss Feed  
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2008-08-11 2:11 PM

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Pro
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Subject: While we're all thinking about electrolytes...

I've heard (and have a hard time believing) that crusted "salt" on your body during endurance type exercise is an indicator that something is wrong.

If I sweat and the water in the sweat then evaporates, whatever else is in the sweat should stay behind on my skin/clothes.  Why should this be an indicator "something" is wrong?

Anyone else ever hear of this?



2008-08-11 2:15 PM
in reply to: #1594916

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Coach
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Subject: RE: While we're all thinking about electrolytes...
KenD - 2008-08-11 2:11 PM

I've heard (and have a hard time believing) that crusted "salt" on your body during endurance type exercise is an indicator that something is wrong.

If I sweat and the water in the sweat then evaporates, whatever else is in the sweat should stay behind on my skin/clothes.  Why should this be an indicator "something" is wrong?

Anyone else ever hear of this?

nope, this is more of an indication that you consume a lot of sodium on your diet and THAT might be bad for you. Hopefully DerekL will chime in for the proper explanation
2008-08-11 2:17 PM
in reply to: #1594916

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Runner
Subject: RE: While we're all thinking about electrolytes...
Salty sweat is not an indication of much of anything, nor is the crustiness left behind.
2008-08-11 2:19 PM
in reply to: #1594916

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Subject: RE: While we're all thinking about electrolytes...
I don't know anyone who can do an endurance event and not have salt crusted on their skin or clothing afterwards. Often, it's washed away when you dump water over your body. Either way, it's not a sign something is wrong, unless something has been wrong since I was doing 25 mile humps in the Marine Corps back in the early 90's. Some people may sweat out more sodium than others, but it doesn't mean somethings wrong.
2008-08-11 2:19 PM
in reply to: #1594935

Subject: RE: While we're all thinking about electrolytes...
amiine - 2008-08-11 3:15 PM
KenD - 2008-08-11 2:11 PM

I've heard (and have a hard time believing) that crusted "salt" on your body during endurance type exercise is an indicator that something is wrong.

If I sweat and the water in the sweat then evaporates, whatever else is in the sweat should stay behind on my skin/clothes.  Why should this be an indicator "something" is wrong?

Anyone else ever hear of this?

nope, this is more of an indication that you consume a lot of sodium on your diet and THAT might be bad for you. Hopefully DerekL will chime in for the proper explanation

I get the crusty salt on me and I don't eat much salt at all.

DerekL???

2008-08-11 2:22 PM
in reply to: #1594916

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Runner
Subject: RE: While we're all thinking about electrolytes...

It's not really a sign of too much anything.

Your body sweats in order to cool off.  The cooling effect comes from the evaporation of the sweat, not the sweat itself.  When liquids evaporate, they tend to leave behind the other stuff, hence the reason there is salt on you.



2008-08-11 2:25 PM
in reply to: #1594952

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Mountain View, CA
Subject: RE: While we're all thinking about electrolytes...
wurkit_gurl - 2008-08-11 12:19 PM

amiine - 2008-08-11 3:15 PM
KenD - 2008-08-11 2:11 PM

I've heard (and have a hard time believing) that crusted "salt" on your body during endurance type exercise is an indicator that something is wrong.

If I sweat and the water in the sweat then evaporates, whatever else is in the sweat should stay behind on my skin/clothes.  Why should this be an indicator "something" is wrong?

Anyone else ever hear of this?

nope, this is more of an indication that you consume a lot of sodium on your diet and THAT might be bad for you. Hopefully DerekL will chime in for the proper explanation

I get the crusty salt on me and I don't eat much salt at all.

DerekL???



x2. My sodium intake is moderate to low, but after a long ride or run I have salt crystals all over the place. I think it's just because I sweat a lot, and after a few hours it builds up. Like the OP said, the water evaporates and everything else stays behind.
2008-08-11 2:25 PM
in reply to: #1594916

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Subject: RE: While we're all thinking about electrolytes...

I personally don't think that is the case.  Just read some of Macca's interviews.  He talks about being a heay sweater and crusty.

I'll refer back to those other articles again:

"My sweat tastes salty"

Yes, it certainly does, and that is because it does contain some sodium. However it contains profoundly less than the fluids in your body, and is still mostly water---body fluids have a sodium concentration of 140mM while sweat has a value of 20-60mM. Therefore when you remove a liter of sweat from your blood, it has much more of an effect on the volume compared to the solutes (sodium), and what happens is that the osmolality rises in response to sweat losses. This is absolutely crucial to realise - you cannot lose sodium, even if you are a "salty sweater", as Gatorade are now claiming. If the sodium content of the blood is dropping, it's because you're drinking too much water, not because you're sweating sodium!

So according to their research and studies they reference in their articles, the ratio of sodium concentration in your blood stays where it should be as long as you don't "drown" it with excess fluid (which leads to hyponatremia and eventually death).

2008-08-11 2:59 PM
in reply to: #1594974

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Subject: RE: While we're all thinking about electrolytes...
my take on it was that it just meant you're more of a heavy sweater the more is left behind (assuming you dont wash it off). heavy sweat rate = more left behind as it dries?
2008-08-11 3:00 PM
in reply to: #1594916

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Pro
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Subject: RE: While we're all thinking about electrolytes...

Here's a link to article Daremo is referencing in his post. 

Good stuff.  Thanks, Daremo.

2008-08-11 3:08 PM
in reply to: #1595079

Subject: RE: While we're all thinking about electrolytes...

newbz - 2008-08-11 3:59 PM my take on it was that it just meant you're more of a heavy sweater the more is left behind (assuming you dont wash it off). heavy sweat rate = more left behind as it dries?

I think we're all washing it off But while I'm running, if I touch my face, or when I get in the car to go home (because I can't really run right near my house for an appreciable distance), I notice it on my forehead, cheeks, etc.



2008-08-11 3:09 PM
in reply to: #1595106

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Cycling Guru
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Subject: RE: While we're all thinking about electrolytes...
I'm often crusty after even medium length runs/rides (90 minutes +).  No biggie.
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