[127.0.0.1]

Now..... how much less energy are you going to have if you don't take the water and dehydrate?

Can someone please calculate energy reduction due to dehydration?

Then you need to minus energy reduction from additional energy used and determine which outcome is best.

I once calculated how many watts are wasted/gained drinking cold water vs warm water vs 1 hour steady at 40deg, 75deg, 90deg room temp on stationary bike pinned at 250 watts output. if you really want to get to the extremes in watt saving don't drink ice cold water it takes too many calories to warm it up

I killed myself after this study. been dead for years.

 

[AEyogi]

It is not for me a question of intentionally dehydrating myself to save carrying weight, but if I am doing a longer ride than usual, or going when it is hotter, then there is the nagging question whether it is worth the extra watts to carry more water. One one hand I have hauled two liters to the top of a mountain and then back to the car without touching it, which seemed like a waste; but I have also skipped the extra water and been MURDERED by the heat and dehydration.

2.75 watts is not a big deal for me. And it is a nice luxury to be able to drink as much as I desire without having to ration.

 

[Gumby_rider]

I once calculated how many watts are wasted/gained drinking cold water vs warm water vs 1 hour steady at 40deg, 75deg, 90deg room temp on stationary bike pinned at 250 watts output. if you really want to get to the extremes in watt saving don't drink ice cold water it takes too many calories to warm it up

I killed myself after this study. been dead for years.

You miss the part about when the body is active, it has to get rid of the excess heat and that takes energy.

 

[Calsun]

When you become dehydrated the blood thickens and is less effective in supporting the muscles being used. How much water is actually needed though varies more than people realize and the suggested minimums are ridiculously high.

Some experts recommend a gallon of water per day and hauling around 8 lbs of water is a problem of bulk more than weight. Recent studies have shown that the amount of water consumed has little measurable impact on kidney function for anyone.

 

[Lenny7]

I'm terrible at math but I can cut and paste.
One pound of excess body weight takes two watts to get up a hill, or three kilograms of fat takes an extra three seconds per kilometer on a climb. Meaning that if you have ten pounds to lose you could climb 7-10% faster. Those gains would take much longer if your focus was strictly on increasing your power output.

 

[006_007]

If I get an ebike / emtb will I need to carry less water?

 

[Gym123]

You miss the part about when the body is active, it has to get rid of the excess heat and that takes energy.

Not to get into an "It's this"/"No, it's not" thing, but the work being done causes an increase in the metabolic rate/use of fuel (food) in an effort to overcome external forces and the energy density of the fuel used raises the body's temperature. Losing heat is just a natural phenomenon that can occur between animate or inanimate objects. Heat finds cold.

 

[prj71]

Meanwhile...Tinker Juarez straps a backpack of rocks on his back and rides 13,000 ft. of elevation.

 

[Nat]

It is not for me a question of intentionally dehydrating myself to save carrying weight, but if I am doing a longer ride than usual, or going when it is hotter, then there is the nagging question whether it is worth the extra watts to carry more water. One one hand I have hauled two liters to the top of a mountain and then back to the car without touching it, which seemed like a waste; but I have also skipped the extra water and been MURDERED by the heat and dehydration.

2.75 watts is not a big deal for me. And it is a nice luxury to be able to drink as much as I desire without having to ration.

I don't like hauling around more water than I need either. If I'm in a new area that's unfamiliar to me, or if I'm riding on a really hot day, I might bring extra water but for my usual local rides I typically bring one bottle (and rarely drink all of it). One measure that I take is to bring water purification tablets like backpackers use. They weigh virtually nothing and take up minimal space, but I have them for backup in case I need to refill my water bottle. This tactic assumes you have a water source so it might not apply to where you live. I live in Oregon so we have streams all over the place from which I can grab more water. Just an idea.

When you become dehydrated the blood thickens and is less effective in supporting the muscles being used. How much water is actually needed though varies more than people realize and the suggested minimums are ridiculously high.

Some experts recommend a gallon of water per day and hauling around 8 lbs of water is a problem of bulk more than weight. Recent studies have shown that the amount of water consumed has little measurable impact on kidney function for anyone.

I got chastised by my daughter a couple of years ago for not drinking as much as "they" recommend. I replied that I haven't died from dehydration yet, so...

 

[Gym123]

Meanwhile...Tinker Juarez straps a backpack of rocks on his back and rides 13,000 ft. of elevation.

I don't like hauling ME up hills- how is he doing that?

 

[Crankout]

Isn't there an app for that?

 

[prj71]

I don't like hauling ME up hills- how is he doing that?

He is not human.

Mountain biking legend Tinker Juarez soldiers on

There is a purity about David "Tinker" Juarez. All the man has ever wanted to do is ride his bicycle. For the past 40 years, he's done that better than almost anyone else, becoming one of the most decorated mountain bike racers to ever wear a United States national jersey.

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