Few points i’d like to put forward please Jerry
you have to drink enough for biological functions, and beyond that, it’s just wasted weight
My point was that it doesn’t matter weight wise if you drink it or carry it, even if the water is in your belly or bladder you’re still carrying the weight of the water
I don’t run or go above 70 or 80 F or so. More exercise and temperature require more water, and can have more severe side effects.
This is a old wives tale, in reality i’ve found that dehydration is more of a problem in colder weather and even more so in wet cold weather.
In warm weather we tend to feel thirsty and most know to keep hydrated.
In cold weather you can sweat just as much if not more, in an ideal world we would remove and add layers as our effort increases and decreases, in reality very few of us do, some times we just can’t be bothered removing the rucksack, top and putting it away, other times we’ll unzip our tops in the hope it’ll cool us down but we know we’re only kidding ourselves as that waterfall of sweat starts rolling down our back.
Now imagine if it’s raining and we have our waterproofs zipped up.
Not only will we sweat more, we’ll also feel less thirsty as we are breathing in rain drops and damp air (for us mouth breathers at least).
So think that we have cold wet weather, we are sweating more, we don’t feel as thirsty as we would do if it was hot, then put into the mix that even mild dehydration will quicken the onset of hypothermia.
So it’s not just summers we have to be cautious
I always drink several pints before I take off, so I start well hydrated
Again though you are still carrying the weight of this water.
If you jump on some scales and drink 500g of water your body weight will go up 500g, just because the fluid has entered the body it’s not free weight.
especially in warmer weather, if you get a little dehydrated, it’s not that big a deal. Drink a pint of water and relax in the shade. I almost always encounter a water source during the day, so I’ll drink a pint and then refill for the rest of the day, so that’s 3 pints in one day
Strongly disagree, speaking from personal experience it can take hours to start feeling the benefits of drinking after dehydration, it can also affect things like recovery and even our performance the following days.
Then there are the how dehydration relates to hypothermia, not to mention how it affects our food processing, especially for those of us that eat dehydrated food.
For you thru-hike guys regular dehydration can be a major cause of kidney stones.
I’m sure many of us have also felt that bloated feeling after gulping fluids down, this often leads to a stitch (no idea what you guys over there call it, in England a stitch is that we get round our kidneys)
As i say we’re all adults here, we all hike differently most of us in different areas and under different conditions and weather, but my points are
1/ If you drink 500g of water of carry it the weight is the same, IF we didn’t carry a container we might be saving that weight, but most of us do any way.
So there are no real world advantages weight wise to drinking rather than carrying a our supply of water
2/ Even mild dehydration can cause long term health problems if it’s done on a regular basis
3/ You are just as if not more likely to get dehydrated in colder wetter weather than you are in summer
4/ Even mild dehydration can have major negative impacts on our performance, both physically and mentally, often it’s not realised till after we’ve rehydrated
5/ Dehydration is closely linked to Hypothermia, so it’s just as if not important to stay hydrated in the colder seasons
These are the risks as i see them.
And what are the gains?
There is non that i can see, you’re still carrying that 500g of water if you drink it so there is no weight saving, even if there was i’m not particularly fit but even i can’t notice the weight of 500g of used water at the end of the hike.
As i say hike your own hike, but from my point of view i think it’s common sense to carry a little extra water if you don’t know for certain there is a refill point on the hike.
P.S.
I have planned hikes to take in a water source (a small lake on this hike) only come across a dead sheep in the lake, i’ve also come across natural springs that were dried up, so i think it’s wise to carry a little extra especially if you are in remote locations.