Donovan Rebbechi <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:In article said:I found myself losing about 1 pound of fluid every 10 minutes if the ambient temperature is
about 80 degrees. Is this normal?
It's not unusual. Temperature makes a huge difference.
Quoted message said:I didn't worry about water loss until now because my runs were no longer than 50 mins. I just
drink about 2 pounds of fluid before I run and then made up for the 3 lbs of water loss when I
get home. Now, my long runs are going to last about 2 hours, I can no longer ignore this
problem. Will those hi-tech running clothes like CoolMax make a significant difference?
They might help a little, but if you're already dressing light, they won't help that much. The
main advantage of these fabrics is that they're less inclined to irritate your skin (wet cotton
rubbing against your skin for an hour or so can be very painful)
Slowing down should help quite a lot -- you simply can't run as quickly at the same exertion level
in this sort of heat.
Maybe some of the long long long distance runners (like Doug) will chime in, but my thought is
that you don't need to completely replace water, and you can afford to drop a few pounds during
the run. If you were to drink 2lb of water during the run and 2lb before, and also slow down, you
could probably reduce your net water loss to 6lb or so.
Cheers,
1 pound loss in just 10minutes? yikes! I thought a pound in a half hour (typical for me) was a lot.
As Donovan pointed out, you will likely have to take some fluids with you (water/gatorade/whatever
you prefer). I do not remember the percentage of bodyweight where dehydration begins (something like
6% IIRC). So if you are a heavier runner, a couple pounds may not be significant on a long run.
It is good you are checking on this. Both extremes of water supply, dehydration and hyponatermia can
be dangerous.
Just a final comment, the temperature does not have as much to do with this as you may think. Try
checking your water loss in cooler weather. I think you'll be surprised to find it is not much
different. You may only seem to sweat more in the warmer, humid weather.
HTH and enjoy the run. Ed