Phil M. said:Leafing through rec.running, I read a message from dot.h@#duh?att.net of
01 Jan 2005:
Then Phil drew me in 😉
Oops. Was that bad?
No. Just that I recognize that most people here aren't running under the
same conditions as myself, so I refrain from more general or Alaskanized
replies unless I see there's a need for it. "Cold" to some people may be
20-30F, where many of these issues aren't that significant, esp. for the
duration of runs most people here do. The OP hadn't really given much
information to get a feeling for whether frozen fluids was really an
issue or not (or maybe that was a treat he had yet to experience 😉 ) so
I wasn't going to say anything unless he said something.
Quoted message said:Quoted message said:I would agree if running in "cool" temperatures, although I've found I
need the fluids for much over about 1:15-1:30 or I'm toast
Quoted message said:(based on
Quoted message said:the way I've trained) - and needs increase when temps get lower (yes,
that's lower) than that, to a certain extent because of the drier air.
How dry? In the winter it gets to be in the 30-40% humidity range,
compared with 60-80% in the summer.
We've been around 0-20F, 60-80% *relative* humidity the last few days. I
haven't gone back and looked at last winter, but I thought we might be
closer to 30-40%, maybe even 10-20% with the really cold temps (-20F). I
have not yet felt a need to cover my mouth yet to keep moisture in the
air and usually hits around +10F and below. My throat has been a little
dry but I found fluid relieved some of that so maybe we do get lower rel
humidity usually, I'm getting more adapted to it, or I'm using fluids
rather than balaclava to relieve dryness? I notice Fairbanks is also
around the same humidity right now and I thought they're usually lower.
BUT 0F air at 70% rel humidity holds much less moisture than 80F, 70%
rel humidity. When that 0F air enters nasal passageways and continues to
lungs, it warms to body temperature 98+F, and absorbs moisture up to
100% humidity, probably mostly from the lungs but some from the
passageway liners. It's important but whether it makes the fluid
requirements at -20F equal to those at +80F, I doubt it.
Quoted message said:I hadn't noticed my fluid needs
decreasing.
Tom and I are saying that fluid needs to not decrease as much as some
people think - at least for "many" people. Some people think fluid needs
reduce with lower temperatures, and I think they may slightly from, say,
90F to, say, 40F (numbers pulled out of sky), since sweat and need for
cooling should theoretically be reduced. But if you're not seeing a
reduced need maybe that also is not necessarily true. But the body
sweats to some extent regardless of temperature. Additionally, when
temperatures get below about 0 to +10F, it feels like the air just
dehydrates the lungs because of the dryness.
Quoted message said:I don't feel any stomach sloshing and I don't have the urge
to urinate during the long runs. So I assume I'm still hydrating
properly. I do have to remind myself to drink when it's cooler.
Quoted message said:Usually somewhere around 20oz/hr works about right for me in most
temperatures where I run (-15F to +70F).
About 36 oz per hour for me, regardless of temps, 30F to 85F.
Interesting.
So I may be
Quoted message said:over-hydrating in the winter or under-hydrating in the summer. I do feel
better after a long run in cooler temps, but that me be due to other
problems with running in the heat.
Quoted message said:*If* I reach the point of
being able to run in warmer temperatures sufficiently that I can do
more than slog, I expect fluid needs would increase above +60F.
How much of the year is it over 60F?
In a hot year like this past one, most of our summer (say 2-3 months)
was above 60F. We set record for most days above 70F, and I can't
remember if it was 24 days or 40. Usually temperatures in the 80s are
counted on one hand. But places in the state still had forest fires
burning when they should be getting snow. Gave new meaning
to the term baked Alaska 🙁
In a more normal (=wet) year, a typical late summer day is probably in
the 50s with rain, or at least overcast. Late May and June may be warm
and sunny - and typically that's when we get our few days of 60-70F. So
in a normal year, say 5% above 60F, I'm guessing.
Since I've been in the field a lot in the past, I don't have much
experience at running either in heat or rain.
Quoted message said:What is slog? Slow jog? Shuffle a
log? Sleigh with a dog?
Very slow jog 😉 For some reason this summer, I could barely move when
it was above 70F - not sure if I was overall tired from other stuff, the
heat, the *continuous* heat without relief (we don't cool off at
"night"😉, lack of heat adaptation or what. In 2003, I was able to run my
hills even above 80F on those couple days when that happened. But I
could sweat fine last in 2003. In 2004, I was having a lot of problems
sweating in the warm temperatures - not sure if that's related or not.
Quoted message said:IMO, that's one of the things you have to figure
out for yourself (because everyone's different) by doing the long runs
and trying various things. If you've only got a few long runs to figure
it out, then you just hope you get things right very quickly.
I agree. I think that's one of the drawbacks of some of the canned
programs - unless they have a section dealing with hydration and fuels.
You build miles by the program, but not necessarily the experience in
the other aspects needed.
This is an aside, but since I'm babbling anyway 😉, the first year I ran
(still on roads), I built up to about 2 hr, 9mi and kinda had this,
but "what if?" feeling. Then the "what ifs" hit for the next 2 yr. I'm
just now getting close to being back where I was (on trails now), but I
feel I can handle a *lot* more situations with a broader experience
background. My peak weekly mileage still isn't close to where it was 3
yr ago, but I tend to pack more experience into each mile now 😉
Quoted message said:Quoted message said:In my case, I also tend to try to stay reasonably hydrated / fueled by
the end in case I have problems driving home - or stop to help someone
who has slid off in the ditch (one of our snowshoers after the last
race. I bought new snow tires for my car this year because of that
road last year.) - or a road closure for whatever reason.
So you have post-run adventures as well? No wonder you need so much
fluid. You need to be super woman after your workout. ;-)
Actually, a guy with a macho truck had stopped first but didn't have his
normal tow strap with him. I contributed a snow shovel, which didn't
help that much, but kinda flagged the couple cars so they wouldn't run
into the cable he was trying to use. Finally someone else came with
strap that they put on the macho truck, I stopped traffic from the
downhill direction, and they got him out. Everyone wished everyone else
a merry christmas and went home, saving the guy a AAA call.
I think that plus the really nasty ice we had the last day of work has
had me running mostly from the house this week with an occasional trip
to trails for ss or ski. There's enough snow in the gutters now that I
can run on uncrowned surface there so no need to get the car out.
Dot
--
"After 26 hours 38 minutes, we accomplished our mission, and the next
day were fortunate to read about our adventure in the sports section of
the local papers rather than the obituaries."
-Dean Karnazes recounting their running of the WS100 trail in winter.