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5

This seems a bit low to me, but there are lots of other factors to consider. The main ones are temperature and exertion/walking speed. Different people also definitely need different amounts of water. One of my friends was nicknamed desert-man as he drank approximately 4x as much as everyone else. If you are in the UK or a similarly cool climate, then 100ml ...


5

This depends on the actual type of clothing and mostly on the wind speed. The wind evaporates moisture from the body. Since evaporation is a cooling process and absorbs latent heat away from the body, the person feels colder. Skin always has moisture on it. Just like a tree transpires, the human body is constantly having water evaporated from it. Wind ...


5

Could the use of anti-perspirant give benefit in extreme cold climate where sweating can be a significant problem. TL;DR answer: Unlikely. The issue is the sheer amount of water your body will secrete during physical exercise. It would be impossible for anti persperant to prevent this amount of moisture. To clarify Anti-perspirants work by: ...


4

How much water you need depends on how big you are, how fit you are, where you are and what you're doing. For example, on Mount Everest, the average person needs to drink 4-5L of water each day just so that their body can function properly. You lose water through your breath, perspiration, urine and bowel movements. If you're a big guy that's out of shape, ...


3

When I was in central Alaska, courtesy of Uncle Sam, we wore vapor barrier boots. They are great for extremely low temperatures, but of you are heavily exerting in milder weather* (down to -23C/-10F range), your socks would get downright soggy. Some soldiers did put anti-perspirant on their feet to help with cold and trench foot symptoms. If plastic ...


3

No, 100 ml per hour is way too little in many circumstances. That would mean only 1 l over a 10 hour hike. Anyone that's been on a 10 hour hike, even not in particularly hot or dry weather, can tell you that's not nearly enough. For hiking in hot desert conditions, 1 l per hour (10 times your suggestion) is more like it. I have done significant hiking in ...


3

When meteorologists tell you the temperature, likely they mean the temperature more than 1m off the ground in a shaded place (for example in a Stevenson screen). Anything sunlit is likely to be warmer. The ground is likely to be different (warmer or cooler depending what else is going on). You can't assume that just because the weather report for the region ...


2

I found this interesting article on the topic of cold weather and hydration. http://www.unh.edu/news/news_releases/2005/january/sk_050128cold.html In cold weather you lose significant moisture just by breathing the dry air. Even in 100% humidity ( very rare in winter) the cold air can suck moisture from your lungs since it warms up in the lungs and can ...


1

Some of these answers have the basics, and new posts are redundant, others miss things or aren't true. I've been plenty warm in 0° with a mummy bag from KMart. The trick is knowing how to use what gear you have. Always have a ground layer to prevent conduction. Go to bed warm, hydrated, and fed. Don't bother with a tent, in general. You'll most likely ...



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