Can drinking excess water effect?

Tony Wesley said:

Bob (this one) wrote:
[...]

Quoted message said:

Come back tomorrow and we'll talk about surface measures. Boy, that'll
be fun... There'll be a quiz.

Very educational and entertaining post.

Thank you. I've written about this subject on- and offline on several
occasions and I do find it interesting. Historical notes about how we
got here from wherever we used to be can be fascinating.

Yes, it's a kind of geekiness... <LOL>

Pastorio

"Mxsmanic" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Doug Freese said:

Sorry Kumar can't help about PH balance. As an endurance athlete I'm
much more on top of excess water and hynonatremia. Many people think
that sport drinks are the answer, when in effect are very poor/low in
sodium. Add heat and potential for trouble is geometric. Extra salt
is a
necessity.

Ideally, people should drink something that is isotonic with what they
lose. Unfortunately, it's awkward to measure the tonicity of sweat
and urine on the fly, and both are quite variable.

Just gulping salt tablets or something isn't necessarily a good idea.

You are correct that one should not just throw in extra sodium. Over 15
years of endurance athletics I understand how much salt I sweat over
time and know how much to supplement and under what conditions. There
are variuos ways to measure sweat loss and usually done during training.
You can weight youself before and after. You can monitor your urine
color and frequency.

FWIW, one of the biggest mistakes that rookie marathoners are making is
overhydrating on simple water the day before the race. They are correct
in that they should be well hydrated. Unfortunately they drink only
water and basically go into the race with low/watered sodium. They then
run and take in some more water or even Gatorbarf. You will hear people
remark I don't undertand why I felt like [censored], I was drinking a ton of
fluid. They will also tell you their stomachs were bloated because
absorption was severely slowed. Just like pinching the gas line on your
car.

-DF

Doug Freese said:

You are correct that one should not just throw in extra sodium. Over 15
years of endurance athletics I understand how much salt I sweat over
time and know how much to supplement and under what conditions. There
are variuos ways to measure sweat loss and usually done during training.
You can weight youself before and after. You can monitor your urine
color and frequency.

But you also need to know how much salt you're losing in sweat--it's
not a constant amount. How do you measure it? I know that people who
are unaccustomed to perspiring tend to lose more salt when sweating
profusely than are people who perspire heavily on a regular basis.

In very hot weather I perspire enough (litres) to leave salt deposits
on clothing, so I obviously lose salt, but compared to the amount of
water I lose, the salt loss is small.

--
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Do we loose only NaCl salt via sweat or some other minerals also? I
think it is KCl, iron also.

Mxsmanic said:

Doug Freese said:

You are correct that one should not just throw in extra sodium. Over 15
years of endurance athletics I understand how much salt I sweat over
time and know how much to supplement and under what conditions. There
are variuos ways to measure sweat loss and usually done during training.
You can weight youself before and after. You can monitor your urine
color and frequency.

But you also need to know how much salt you're losing in sweat--it's
not a constant amount. How do you measure it? I know that people who
are unaccustomed to perspiring tend to lose more salt when sweating
profusely than are people who perspire heavily on a regular basis.

In very hot weather I perspire enough (litres) to leave salt deposits
on clothing, so I obviously lose salt, but compared to the amount of
water I lose, the salt loss is small.

--
Transpose mxsmanic and gmail to reach me by e-mail.

Kumar said:

Do we loose only NaCl salt via sweat or some other minerals also? I
think it is KCl, iron also.

Primarily NaCl, because we have so much of it.

A large loss of electrolytes through perspiration is usually
pathological, although people who sweat profusely without having done
so in the recent past may at first lose a lot of salt and electrolytes
in their perspiration until they become acclimated.

I don't believe iron is lost in sweat (normally).

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