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PostPosted: Wed Jan 20, 2010 10:30 am
by John Duffield
Day Hiker wrote:
John Duffield wrote: I expect to sweat about a litre and exhale another half litre.


How do you know or figure that 2:1 ratio?

The total amount sounds right, based only on my personal experience.
But of course I had no way to know how much was in sweat and how much was exhaled. I just knew what the scale consistently told me before and after.

Your 13.1 is a lot longer, but maybe (hopefully, for my ego) you don't run it as hard as I ran my 3.2. :D

And it's probable that your body weight is considerably less than my 215 to 220 when I was running some years back.



It's the ratio we used in Bikram Yoga. Though there the water would go out a lot faster. It takes about two hours for your body to process the water. So you have to go into the activity with your body completely hydrated. In running, I find it best to retain the water. So I tend to dress in order to retain it.

PostPosted: Wed Jan 20, 2010 5:13 pm
by Big Benn
A thread about sweating!

Some here will know about an unidentified bug I have had for decades. (Having yet another attempt at present with my doctor etc to try and find out what it is.)

I normally sweat quite a lot when walking the hills etc. When the bug hits, (I try and walk through it), I can sweat enormously, (but I don't sweat with it if I am not exercising). And I mean enormously. i.e take of my top shirt after a walk and ring it out up to six times still getting a massive splash of liquid going onto the ground each time. :shock: (Six "ring outs" is the record).

What I do for layers to try and combat this is to wear an extreme lightweight Berghaus wicking T shirt as my base layer. Then my normal Paramo shirt on top. Plus a mountain jacket. In winter with a full size fleece as well under the jacket.

What tends to happen is I start by getting body wet. Then the base layer kicks in and moves the sweat through to the other layers leaving me close to dry underneath. At least the top half. I just have to accept my lower half gets wet and stays wet in most conditions, including winter.

Interesting effects of such vast sweating, presumably combined with the impact of the wicking base layer, is to push so much moisture into the inside of my goretex jackets as to destroy the waterproofing of them. I have been told that is probably because the bug is making my sweat acidic. But believe me a totally new, or recently correctly proofed goretex jacket will "wet out" in rain very soon as the sweat from the inside gets into it.

Another interesting side effect of such sweating is that in very cold and dry weather, (ie as experienced once last winter in Snowdonia), with significant windchill, my top jacket can just freeze solid if I have been ascending for a while!

Hope I haven't gone too far off topic. But I reckon when my bug really hits I am World and Olympic champion at sweating.

Maybe the firms who make wicking material etc should use me as their test bed.

PostPosted: Wed Jan 20, 2010 6:00 pm
by mconnell
Brad Marshall wrote:
ScottyP wrote:Brad, aren't the looks you get on the SM wearing a pack priceless!! It took a while but now I think my whole gym knows what I am doing. There was the time I forgot to fill my water bottles for weight and had to use 2 weight plates. Wasn't an issue until I got home and they were still in there!


That's funny and, yes, I certainly get those strange looks. I'm 45 years old, slightly overweight, working out at the local university and everyone entering has to walk past the SMs. I can't imagine what all those young, female university students are thinking when they walk by me with their rock-hard bods and well shaped....what were we talking about again?


And you're trying to tell us that the sweating is from the workout?

PostPosted: Wed Jan 20, 2010 7:00 pm
by Brad Marshall
mconnell wrote:
Brad Marshall wrote:
ScottyP wrote:Brad, aren't the looks you get on the SM wearing a pack priceless!! It took a while but now I think my whole gym knows what I am doing. There was the time I forgot to fill my water bottles for weight and had to use 2 weight plates. Wasn't an issue until I got home and they were still in there!


That's funny and, yes, I certainly get those strange looks. I'm 45 years old, slightly overweight, working out at the local university and everyone entering has to walk past the SMs. I can't imagine what all those young, female university students are thinking when they walk by me with their rock-hard bods and well shaped....what were we talking about again?


And you're trying to tell us that the sweating is from the workout?


Hahaha, yes. My wife used to work for the largest law firm in the area and is now with the tactic unit of the local police force. If I get out of line I'll really be in for it :shock: