Energy consumed by weight of gear on a multiday hike

[freeelectron]

TL;DR

Trying to estimate the amount of extra food eaten per unit of gear weight on a long hiking trip

I'm trying to figure out how many extra kcal I would burn on a 600km hike with a 30,000m (30km) positive gain for every additional 100g (or 1kg, whatever) of gear in my backpack.

It would obviously be a quite rough approximation, as there are significant variables such as the efficiency of a human body which must be around 20% and the fact that the weight is not only lifted vertically but also swinging around.

Any idea of a calculation that wouldn't be too wrong?

Thanks

 

[Bystander]

TL;DR Summary: Trying to estimate the amount of extra food eaten per unit of gear weight on a long hiking trip

Any idea of a calculation that wouldn't be too wrong?

https://havokjournal.com/fitness/lifestyle-nutrition/

 

[freeelectron]

Thanks

It looks like every additional kg on a 6h hiking day (3h going up, plus some energy for the flat parts and downhills) with a 10% grade would add ~200 kcal, which doesn't sound totally off, but I expected more.

That's another interesting calculator
https://www.outsideonline.com/outdo...acking/ultimate-backpacking-calorie-estimator

So, if the trip lasts about 24 days, every additional kg of gear would potentially require 4800 additional kcal

 

[PeroK]

It also depends whether you want to lose weight on your hike.

 

[Bystander]

https://en.wikipedia.org/wiki/Military_of_ancient_Rome

Logistic requirements/supplies/food same fifteen-twenty centuries ago as today.

 

[Rive]

It looks like every additional kg on a 6h hiking day (3h going up, plus some energy for the flat parts and downhills) with a 10% grade would add ~200 kcal,

Just for the log: simply by a wrong packaging or an inconvenient shoe you'll be off to the calculation by lot.
Not really an issue for a short hike but you also mentioned 24 days, and that makes safety margins a really tricky problem...