I've learned more about nutrition from these 3 videos than I did from the actual college nutrition course I took

@GearSkeptic

Жыл бұрын

Thank you! I’m very glad if any of it can help!

Me stumble across your videos Me watch all videos in one day Thank You 👏👏👏👏📚

@barracksrat728

2 жыл бұрын

Same here!

@tom_olofsson

2 жыл бұрын

Me too.

❤️ this channel. . .science the heck out of backpacking! so informative and entertaining! awesome work from the bench! 👏🏻

@GearSkeptic

3 жыл бұрын

Thanks very much! Truly appreciated.

I may have missed it but I didn't hear you mention water loss from breathing. Sweat is always the one people think of but in fact every exhalation includes some water: something mainstream people are starting to notice when they wear a mask! Although the loss per breath isn't great, it does add up pretty quickly. Great series of videos

@GearSkeptic

3 жыл бұрын

You are not wrong. I never did mention that, and it is a good point. When looking at the actual methodology in the sweat studies, I found they used different ways of testing. Some used sweat patches placed on the skin. That would definitely exclude exhalation losses. But, in the meta-review I looked at, there were some well-articulated criticisms for the accuracy of patch testing (at least for water, works well for salt). The studies argued as “better” either measured total loss by body weight before-and-after, or actually having subjects workout in sealed “hoods”. I think either of these would capture (and therefore combine) both sweat and exhalation losses.

@chrismiles2067

3 жыл бұрын

@@GearSkeptic This site also indicates that while breathing rates and thus moisture loss increases with activity, it is roughly offset by the increased metabolic output of water by oxidation.

Great work! The older I get, the more important this topic becomes. Cramps and headaches makes for a bad hike!

I know of a slight alternative that splits the difference and avoids the more psychological side of "forgetting to drink". Set an alarm for every half-hour or so. When it goes off, ask yourself if you are thirsty. There's a known problem where people who do long activities loose track of time and forget to do things. Sometimes people get lost in the activity and forget to stop and go to sleep, other times food and water get pushed off to the side. Getting your head back in the game (or out of it in some cases) every once on a while can prevent some degree of this focus induced lack of awareness. Note: this state rarely causes the impacted person to reguard it as being a problem. Usually, after 'coming back to reality', the individual will report being in a great mood and feel a sense of accomplishment. To the extent that 'the zone' or 'the flow' is potentially detrimental, I don't have any sources to cite, but it's information I find intriguing that I often pay attention to, and I see it much more often than I think people realize it themselves. Great info. I found your channel earlier today and am excitedly learning new things. May your body support you and your goals for many years to come. Stay strong, stay healthy.

I'm still trying to figure out who you are in terms of what your background is! In a nice way not a stalker way lol! You're obviously a professional of some sort, you know how to find and read full text research articles (a lot of which can only be obtained by paying exorbitant fees, or by having access to an institution w large libraries such as universities, or by having online access via an institutional account). You have a great foundation of knowledge in physiology and medicine. You are very fluent and comfortable talking about these topics. I'm so curious! Love your humor especially in this video.

@GearSkeptic

2 жыл бұрын

I will just say that it is a sort of premise of the channel that the presenter shouldn’t be considered an expert in any way. There is just sourced information for folks to make of what they will! 🥸

@BurroGirl

2 жыл бұрын

@@GearSkeptic Yup I understood it to be exactly that.

10:56 love it. Awesome videos, appreciate all the hard work in putting them together. Having a channel of my own I know how much work is involved.

Omagosh. I have so much fun geeking out on your videos!! They say you pack your fears. And apparently My biggest fear is running out of food because it’s always the largest weight in my pack! Now I have so much more info and I can figure out how to safely reduce my weight while staying energized on the trails.

@GearSkeptic

Жыл бұрын

Sometimes it is just fun to analyze and optimize!

You mentioned dehydration & I have found myself on the brink of dehydration in my “off trail” life. I suspect that many others are in that same circumstance, so it does not surprise me when persons get dehydrated when they go out on a dayhike in high temps. Great videos, Part 1, 2, 3 & 4, on “Performance Nutrition for Backpacking”.

@GearSkeptic

Жыл бұрын

Thanks! It is one of those things that is easy to misdiagnose, and may be more common on trail that some realize.

I have had 2 separate heat related medical incidents. The first was from dehydration. The second was several years later and ended with hyponatremia due to trying to prevent a repeat of the first. Both experiences were terrible, but drinking too much water feels much worse than not drinking enough the impairment was significant I could barely talk fast enough to make my sentences coherent.

@GearSkeptic

Жыл бұрын

That's rough. I was having problems getting light-headed when standing up. Almost passed out a couple of times. Took me a while to figure it out.

While these videos are huge fun for my analyst brain and I appreciate the work and thought that went into them, I do find it interesting how well the classical advice (regularly supplementing with good trail mix combined with good hydration) meets so many needs: With a good mix, carb/protein ratio, along with fats and salts can be easily tweaked. Also, trail mix is high density food. It doesn't help much with fast recovery and it should be treated as a regular supplement rather than primary nutrition, but it meets and even optimizes a lot of nutritional needs during long stretches of moderately strenuous exercise like backpacking. Plus, trail mixes can be relatively cheap, easy to prepare, easy to consume while hiking, and delicious. All of these are factors in what works in everyday usage vs. controlled studies.

@GearSkeptic

3 жыл бұрын

Agreed! I’m a fan of the concept of evolved systems. Given the right conditions: enough people trying enough variations over enough time, and sharing/comparing results to record and preserve progress, you can get a surprising amount of optimization organically. Reminds me of The Wisdom of Crowds by James Surowiecki.

Have been waiting for this video! Thanks

Lovely Video! Thank you for posting. Can't wait to see more content 😊

Excellent summary - you can count on that I'll put it to good use this coming hiking season! Big thanx from snowy ❄️🌨️ Sweden ;)

Such excellent videos. As an outdoor enthusiast, science nerd, & comedy lover, thank you!

@GearSkeptic

4 ай бұрын

👍🏼🤓

Another great video!

Aside from the very helpful information your research provides, Id like to thank you for giving me more laughs and chuckles than most stand up comedy specials

@GearSkeptic

4 ай бұрын

🥸

Nice disclaimer up front. Excellent, articulate hands. Thanks. Kentucky

Two thumbs up...another great learning experience.

@GearSkeptic

3 жыл бұрын

Thanks again!

Very helpful! Thanks for all of the research you do. Plus - you make me laugh!

@GearSkeptic

3 жыл бұрын

😁

It’s amazing how in depth you get and how your able to explain it so my non scientific 🧠 can understand. I just want to say thank you for all the time and effort you put into your videos. I really have learned a ton of information and I’m sure it will all translate to me making the most out of my backpacking trips and growing as a hiker! Thank you 👏👏👏

@GearSkeptic

10 ай бұрын

Thanks very much! Most kind, and glad to help.

You can't do fine math on numbers with large error margins and then forget that answer bears that uncertainty. 🔥🔥🔥 The Physics teacher in me is very excited with this reflection. We are looking at initial range where there is 50% difference between the low and high number. And then we are magnifying that by a couple of thousands. That initial range really does speak to the uncertainty of our understanding of hydration. That numerical range likely verifies by a personal test protocol is the best approach. Even having a sense of where you might fall in one climate and then using that as a hypothesis for the conditions you can't test in seems more reasonable. Particularly with knowing the overall range of hydration as a boundary.

i love this guy

Thanks a lot GearSkeptic! super helpful and clear!

@GearSkeptic

Жыл бұрын

Glad to help!

Honestly never seen someone more excited about 45% VO2max !! I now get excited any time I see 45% VO2max quoted 😂 thanks so much GearSkeptic these series are AMAZING

@GearSkeptic

4 ай бұрын

🤓

Keep it up bro. Very informative. Just got into backpacking. I now backpack with my chest rig and AR. Great workout and very practical. Honestly, gym memberships aren’t worth it now that I have a good set up.

@GearSkeptic

2 жыл бұрын

Agreed. I hate the hamster wheel. Much better to get outdoors!

Very helpful. Thanks so much.

@GearSkeptic

3 жыл бұрын

You are very welcome!

Tremendous resource for general nutrition as well as backpack nutrition.

@GearSkeptic

Жыл бұрын

Thank you! I hope it can help.

You remind me of 'This Old Tony'. You got that same sense of humor but with a very different topic. (he is a youtube machinist)

Really appreciate this vid. From a practical point of view, I have found that it works best for me if I drink a planned amount per unit distance hiked. In my case, I find that I need about 1 liter for every 6 miles hiked and here I am talking moderate temps of 75-80 F. If it is cooler - like 50 F, then I need one liter for every 8 miles hiked(and more for hotter). This is when I'm walking pretty quickly, about 4 miles / hour, but lightly loaded. I know that usage needs change with terrain, but in general for longer hikes, the average is 'flat', so there really isn't much change there unless there are very long prolonged uphill periods. As noted, you can monitor this by how often you need to pee and three hours is good timing here. One other thing that works well for thru hikers is this strategy of not eating dinner right at the end of the day, but eating dinner maybe 1-2 hours before the end and making sure that when you do stop for dinner then, you intake a combine one liter of fluids dinner + free water. Then continue to drink like normal as you walk before camp and when you stop for the night you should be all hydrated. It is not desirable at all to try to 'catch up' on hydration when you stop for the evening by drinking a lot, because you often have to pee then after you head to bed and it is really nice to get a good night sleep without having to get up to pee one or more times. In the morning, then again make sure you are hydrated by assessing your urine as noted in the vid and go from there with your daily strategy. If you don't have to pee when you get up, you are probably not fully hydrated. In the end, it helps a lot to know your own body and needs. One last thing is that it if you are drinking out of a water bottle (one liter type) then you can directly know your actual water intake over time, this as opposed to drinking out of a hidden bladder. For this reason, it is almost always preferable to drink in a way that you can directly monitor your intake so you know what you are drinking and can adjust as needed.

@GearSkeptic

3 жыл бұрын

Good points!

Thanks!

@GearSkeptic

Жыл бұрын

You’re very welcome!

Speaking of large margins of error in biological studies, there is possibly a fundamental misinterpretation of the data using classical methods. When analyzed to account for groupings of variants instead of averaging across the board, we're finding that the reason so many of these studies have such large variants and often seem to contradict each other is that people may have wildly different responses to different nutritional stimuli. Other areas of study seem to bear out that this may be less genetically influenced and more influenced by our microbiome. Our microbiome affects everything from the foods we do better or worse with to disease risks to mental health. Understanding those differences and accounting for them will drastically improve health care, including preventative measures and sports medicine.

@ashmaybe9634

11 ай бұрын

Would be interesting to see studies done on folks with optimised gut biome +food choices through a scheme such as Zoe (in the UK).

Your level of analysis on topics is unparalleled. Great job. So if I drink a liter of water and match it with a beer I'll replace the minerals I've lost while hydrating... Damn why do beers have to be so heavy 🤣 guess I'll have to stick with water packets

@GearSkeptic

2 жыл бұрын

If I could just perfect that powdered alcohol recipe…

At 20 minutes I was so thirsty I had a shot of tequila. I used a touch of salt and a bit of lime to help with my electrolytes. (Totally great channel. I think your talks are masterful. Be well. Mama Gecko)

@GearSkeptic

3 жыл бұрын

Thank you very much!

Love your stuff, but having to stop this at 15 minutes in, because I feel too bad for not drinking water

Love your videos! Any tips on nutrition/hydration and minimizing mountain sickness?

@GearSkeptic

3 жыл бұрын

Interesting question! I found this article by WebMD. The only thing, nutrition-wise it mentions for prevention is to make sure you get at least 3-4 quarts of water per day and to eat 70% of your calories from carbs. Didn’t really say why, though. 😕 www.webmd.com/a-to-z-guides/altitude-sickness#3

Absolutely LOVE this set of videos!!! Nice to know my instincts to use my pee color and how long since I last peed are valid. That's how I've always done it, just never heard of it from anyone else. I'm a veterinarian and I also watch my dogs and burros pee when we're out on the trail. Thank you SOOOOO much for addressing the "camel up" doctrine I've heard in many other YT videos. I always took issue w this as not being a great idea because we physiologically are NOT like camels....or even donkeys. Did you know donkeys are 2nd only to camels in the ability to deal w lack of water? They literally can dehydrate to 30% and can rehydrate extremely rapidly, safely, as in within a few minutes. They therefore are far superior pack animals on dry trails compared to horses ;) Just sayin'.. And they are far more personable - more like dogs than horses.

@GearSkeptic

2 жыл бұрын

Thanks! I did not know that about donkeys. Very interesting!

Absolutely incredible, thorough videos. Thank you!

@GearSkeptic

3 жыл бұрын

Thanks very much!

Adding something that's rarely discussed, extreme temp changes. Example, was in a very hot environment for months up to 125° , then was sent to Germany for a bit for training, then back to the gates of hell. That short time in a much cooler environment "snow on the ground" kicked my butt. Was consuming 3 GALLONS of fluids, 2 liter of water to 1 liter of electrolytes. Here's what I found and experienced, when exposed to such a extreme temperature change your skin begins to filter your blood similar to your kidneys. Your sweat will smell like PISS. Only had to pee 4 times the entire day but that was in the afternoon. Something else I observed was my bodies desire to clear the bowels out to help with absorption. That 3 days without water is for someone in an air conditioned environment and not performing any activities.

Ok. That's a lot of information to get back to what scouting, and backpacker has been telling us for over 30 years; check your pee. I do appreciate your efforts. Very interesting.

Should people should carry a clear or white pee cup to test color? It seems like it might be difficult to discern shades of yellow from the golden arches hikers make.

@GearSkeptic

3 жыл бұрын

I carry a pee bottle for overnight use in the tent. You do, however, sort of get used to judging in the field.

What about using the skin turgor test (ie pinching the back of your knuckles and watching how quickly it bounces back) as an additional guide to hydration levels in the context of hiking? Is that something useful to monitor? It seems to have the convenience of being done on demand, rather than only when the urge to pee comes and having to judge the colour under uncertain lighting and background colour conditions.

Not always easy to judge your urine color in the field though especially if night hiking. The Bedouin were said to have found the frequency of urination by British soldiers in WW1 highly amusing. They themselves seldom went more than once in a day in the desert.

Love your videos, have been thinking about and tried to research hydration for a few years but have not found any sources this thorough! Looking forward to the electrolyte video. Question: at around 22.30 in the video you are discussing how much speed and time you will lose considering different temperatures at a constant amount of dehydration, claiming you will lose z amount of time by being dehydrated. However, isn't it fair to take into account that you would probably be hiking at a lower pace at these temperatures even if you were properly hydrated? Perhaps I misunderstood some part, but with my assumption, the performance loss as a consequence of dehydration should be lower than you came up with.

@hakanlagerberg8299

4 жыл бұрын

Of course, your main claim, that hydration is more important at higher temperatures will still hold true, so it's probably not a very important nuance!

@GearSkeptic

4 жыл бұрын

You are correct about the heat alone slowing you down, even if properly hydrated! But, the studies cited made efforts to isolate how much additional performance loss came from the combination of hyperthermia and dehydration, so they could isolate the effects.

@hakanlagerberg8299

4 жыл бұрын

@@GearSkeptic Ok, that makes sense, thank you for clarifying!

Really educational video and I've been enjoying slowly making my way through this series. Got a question though: Should sweat rates be added to the baseline water consumption based on calories? So 4L for 3500 cals (spread out over the day) + .5L/Hr? Or does the .5L per hour also cover the base rate, eg an 8 hour day gives you 4L. 8L sounds excessive, although if given a 16 hour day it wouldn't cross the 1L/Hr threshold for overhydrating. If there's every a V2 of this it'd be neat to see considerations for altitude also.

@GearSkeptic

2 жыл бұрын

I would have liked to formulate some kind of guideline for water needs, whether it be per hour, mile or other. But, there are just so many variables they can’t all be accounted for with even an approximate rule. You’ve got water needs based on calorie consumption, temperature, wind, humidity, exertion level, but then each person will vary based on fitness level, adaptation to environment, body type, clothing… The variation is such that the noise exceeds the signal.

In the sport books of the 1980s about bicycling and jogging the instruction "drink before you are thirsty" was already and always present. Nobody considered the risk of water poisoning as it was implied that one would not drink to the point of discomfort, but simply had to drink before the body begins reclaiming water. In my experience, one cannot replace water lost during exertion (a hike, or a fast walk in the park during a very hot day) even if he wants: the body refuses to drink that much, and one has to accept a certain amount of dehydration, which is recovered during the evening. Oligomineral water is bad for you - whatever the advertisements say - and should be avoided. Drink good old mineral-rich water, and get salt supplements.

Since burned fat is converted to water and CO2 I wonder how much eating a high fat diet can contribute to hydration.

You can survive months without food, provided you have ample water. See all the documentation and the videos about therapeutical fasting. I personally fasted (water only) for 29 days in 2020, and I survived, apparently. On the other hand, dehydration is extremely dangerous very fast, as shown in the video. We have mechanisms to store up fat for the future, like a marmot, but we don't have mechanisms to store water, like a camel.

Yes, slipping behind, the longer I go, is an issue. Running marathons, my hydration got so far behind, serious fatigue and the water consumed staying in my stomach, was ridiculous. My pee was brown, thicker, with much less volume. I was drinking to thirst along the way. A water stop and pee break the last 6 miles indicated water splashing inside my stomach and my pee was thick and brown. I wonder if there was some sort of blood shunting, away from my mesentery, to my legs and leaving good water unused, inside my stomach. Just a guess. I don’t know. I just felt really tired.

Thanks for all this. You discuss cardiac drift, but actually do not use the term. With all these sport & activity watches that keep track of heart rate along with GPS + ABC, it seems that one might be able to just look to see if their heart rate is higher and/or increasing for about the same exertion level to know that one is dehydrated and needs to drink more. What say the research articles?

@outdoorbreeze6529

4 жыл бұрын

Interesting point. I'm navigating with a GPS watch than monitors my heart rate, so I'll try to keep tracks on that and see if I can see changes when being slightly dehydrated. Generally not a bad idea to monitor the heart rate anyway to make sure you stay in the aerobic zone.

@GearSkeptic

4 жыл бұрын

Yes. Interesting idea. There are options to get a chest strap to monitor breathing rate. Might want that data point. Compare your heart rate to breathing rate, see if you have “too many” pumps per breath?

I wish these things concerning the care and recovery of our bodies would have been focused on more than just glazing sloppily over the health book which I permanently “borrowed” from home economics to be able to calculate caloric necessity along with the other small nuggets of nutrition it contained which few have survived to meet our modern understanding. Yep….the early 80’s.

I still wonder about what to do when you get to the water source. Assume you have lost 2l of water (3%). should i replenish this straight away? since the body can only process 1l/h, should I drink one liter and take one extra for the next stretch? And in terms of cameling up , is it ok to drink 1l at the source, and then nothing for the next hour? or is 1l at once too much? and another question: how on earth do you measure the color? it seems very difficult without a white cup. with a toilet ok, but in the wild?

@GearSkeptic

2 жыл бұрын

I would drink the first liter and carry any extra needed, drinking as needed while you go. I usually have a 2L Platypus soft bottle on hand as an extra, in case of long bouts between water sources. In the electrolytes video, there is info on how to make more efficient use of the water you do drink. For pee color, if you can’t see the stream before it hits the ground, maybe use a small tab of toilet paper like a litmus test. The white paper could help get a read on your color.

Isn't your weight after exercise also less by the amount of energy you expended (exhaled)? Or is that negligible compared to sweat?

@GearSkeptic

7 ай бұрын

Technically, that would be true. But, you are right. Next to the sweat, it wouldn’t be noticeable.

Hey! I think I may do a matching series, but more trying to describe the various states from a heuristic perspective, and covering counterpoints or gaps in the research you present. Mind if I use clips/care to collaborate? Generally agree with most of it, and planning to highlight particular how style of hike terrain can play a major role. Let me know, check my about page if you want to talk about it.

@GearSkeptic

3 жыл бұрын

Sounds interesting! I don’t mind about clips. Unfortunately, I’m so busy right now (going to be moving, spending the next few months on tons of house stuff) that I couldn’t do much in the way of collaboration.

I both like and hate that urine color is the best metric to follow while out and about.

Ran across gearkeptic from r/ultralight, and it’s just been video after video of teaching how I’ve been doing everything wrong.

@GearSkeptic

2 жыл бұрын

Just refinements! No right or wrong 🤓

I was wondering about the source for your figures on changes in fluid needs based on how much food is consumed (6.59). i could not find the reference for a person consuming 2000 calories a day, needing 2-3L per day, or that water intake needs would increase. My thoughts are that this would come from water already in the body, although you would need to be careful not to count any water added to a dehydrated meal as water drunk, as it would just still be in the more generalised 10% of water from food. I realise that is not exact anyway, as some of the studies indicated a huge variation in water from food.

@GearSkeptic

3 жыл бұрын

The article referenced in the video for this part was the one from news-medical.net. Here is the link: www.news-medical.net/news/20120530/Dehydration-how-much-should-we-drink-per-day.aspx

@chrismiles2067

3 жыл бұрын

@@GearSkeptic I may be reading this differently to you as the referenced article is unclear. We do have to take in extra water during the day (US males the average is 3.7L and Aussie guidelines 3.4L not counting food intake). The body is recycling all its water with some losses that 3+ litres tops up and gastric juices just increase with more food. I actually had read that article but assumed the 2L was part of the average not additional needs and that extra food makes no real difference unless it was all completely dry. In the scheme of things probably not that important and forgot to add earlier that your KZread series is easily the best hiker related material I have viewed.

@GearSkeptic

3 жыл бұрын

As I understood it, there is water required to digest and that water isn’t entirely (or even mostly) recycled. You first need additional fluid in the stomach. Just eating wet food isn’t optimum on its own. You can do it, but it actually dehydrates you to at least some extent because your system will pull water from your body into your stomach if you don’t drink enough when you eat something. I should point out that this particular understanding didn’t come from the video article in question. I had done separate research on it, and how much you should drink when you eat. It was recommended to have at least an 8oz glass of water with even a regular (i.e. “wet”) meal. Otherwise the aforementioned incremental dehydration due to digestion. As far as that water needed in the stomach goes, it was my understanding that it isn’t particularly recycled. Rather, water becomes necessary to transport and dispose of waste products via urination. So, that was (I think) why a water-need per calorie consumed was developed, that is essentially independent of, say, water needs for exercise sweat. Digestion and waste water PLUS exercise sweat water (and breath loss) will together drive daily needs. Again, as I understood it. And, my point in the video was just that, since all of this is based on normal, wet diets, a hiker with a deliberately dehydrated setup might consider factoring up. Hope that makes sense!

@chrismiles2067

3 жыл бұрын

@@GearSkeptic Firstly, thank you again for this work. Sorry for the delayed response - out hiking and then caught up in other stuff. I get the reason that you were highlighting this point, and like you , I am not a health professional, so I don't quite grasp some of this information at times. However, like you I am interested in hiking optimal performance with minimal weight. I took a look at the original text by Susan Dudek www.yumpu.com/en/document/read/41452120/nutrition-essentials-for-nursing-practice-2014-cd (P141) and the study she adapted the formulae from here www.ncbi.nlm.nih.gov/pmc/articles/PMC2495085/ The way I read Susan's book, it was just one of 3 ways to estimate water needs in the absence of any authoritative studies. The other two ways were based on the person's weight which is obviously somewhat commensurate with their calorie intake. Anyway, the upshot for me is that it is not necessarily a direct linear model, but on the other hand may be better than just assuming the averages utilised by the various national bodies which don't fully take into account body size or food intake, although the gender differentiation partially does this.

Its my understanding is that a lot of water loss is from breathing. Considering the condensate on inside of tents, seems plausible.

@GearSkeptic

2 жыл бұрын

It looks like it can vary significantly depending on temperature, humidity, and exertion level. On a warm day in high humidity, water loss through breathing can be as little as 7 ml/hr. When it is below freezing and very dry, it goes to 20 ml/hr. And, during very high exertion, it can get to 70 ml/hr. Here is the study I referenced: pubmed.ncbi.nlm.nih.gov/22714078/ Hope that helps!

I have a hand fetish so your videos really get me going!! ;)

@GearSkeptic

2 жыл бұрын

🤌🏼🤏🏼🤚🏼 🤡

Maybe I missed it, but how do I figure out how dehydrated I am (2, 3, 4%)?

@GearSkeptic

Жыл бұрын

To do it by the actual numbers would require taking your weight before and after sweating, and without other changes like food and waste. Not really field practical. I just use urine color and frequency as a guide.

@chadbrow

Жыл бұрын

@@GearSkeptic How would you know your actual dehydration level prior to a sweat/weight test. it seems you would have to be 100% hydrated prior to the test. Is there a blood test?

@GearSkeptic

Жыл бұрын

The studies I’ve read don’t actually say. They just state that subjects began in a euhydrated state. It’s mostly a relative measurement, though. Weigh yourself at the start, then again after sweating. Measure the water loss.

1l = 1kg ... how is way better to remember that 1l = 2.205 something ????

@GearSkeptic

Жыл бұрын

It was a joke

In what planet does 24 C considered cool environment? And 49 C just hot?

Seems like, considering the weight, I probably have more time than weight carrying capability... I'll be a bit dehydrated.

I believe in GearSkeptic.

@GearSkeptic

2 жыл бұрын

Is that a contradiction…to believe in a skeptic? 🤓

@_..____

2 жыл бұрын

@@GearSkeptic Yes, I was just being a smartass. But it's true.

I always think in terms of metabolic demand plus sweat. It works out… based on your numbers. On a hike that burns 400 calories in an hour - you’d roughly consume 0.4L of water metabolically (1ml/calorie???). In addition, you sweat 0.5L. That’s roughly 1.0L/hour - which is my general guide for strenuous or hot sections. Heat and work seem to balance each other out - when it’s hot you slow down.

@GearSkeptic

Жыл бұрын

Interesting!

If hyponatremia is the term for drinking too much water, then what is the term for having your brain overloaded with big menacing words. Dang, I had to pause the video at least 4 times to look them up. Now I know what they mean, but I still can't pronounce them very well. Plus, now I'm addicted to all of your subjects.

@GearSkeptic

2 жыл бұрын

Skepticemia?

5:06 1 l = 1 kg, 1 ml = 1 g. - If you need complicated formulas, something may be wrong.

Just a little bit of information to add to this discussion... If you take a vitamin B complex supplement, it makes your pee dark, and pungent! 😬 Don't over-hydrate!

So no need to dehydrate fruit to save food weight, because you have to take that watee from the bottle anyway :) Of course it does not apply if you take yoir water from nature and noy from the back pack

The sodium elephant in the room? Or not in the room?

@GearSkeptic

Жыл бұрын

Definitely in the room (see Part 4) 😉

@gonefishingtoday

Жыл бұрын

@@GearSkeptic I was hinting at the lack of sodium.

I drink beer, is that ok?

@GearSkeptic

2 жыл бұрын

It’s great with a slice of pizza, but not as a hydration strategy. Alcohol is a diuretic, which means it actually dehydrates you. Drink extra water. It is the dehydration and electrolyte imbalance that actually causes hangovers!

Dick Proenneke narrates

I make a powder of NaCl, KCl, & MgCitrate that I take once a day in my drinking water.

@coachhannah2403

10 ай бұрын

Almost impossible to 'overhydrate.'

We dont have data for higher temperatures but...... HOLD UP BRO.....IF YOU HIKIN IN 120°......you are dying

@GearSkeptic

Жыл бұрын

I am never gonna try that experiment!

2 plus 2 still equals 4 right? my brain hurts lol

@GearSkeptic

2 жыл бұрын

I’m not sure, either. Probably should put it into a spreadsheet and double check.

@anthonyfredrickson

2 жыл бұрын

To be true though .. Im training for a 24 hour Endurance event in the Heat of Burnet Texas.... out in the sun.... so I appreciate the video... wont do more then a liter per hour ... have two 3L bladders and a nalgene of pedialyte and water pump to get me through

@GearSkeptic

2 жыл бұрын

Wow! That sounds intense. Best of luck and stay safe!

This vid is R. Kelly approved

@GearSkeptic

Жыл бұрын

Ha!

the "talking hands" format is WAY too distracting

the hands suck. would love to watch but camnot take the hands