Try running slower? If I run 50k at 7min/km I'm not tired at all, but walking the same distance at 12min/km leaves me exhausted.
The mental model in my head sort of accounts for effort it takes just to be upright for 10 hours even if you don't cover any distance at all. Low-effort running saves me half of that energy because I spend less time upright.
The mental model in my head sort of accounts for effort it takes just to be upright for 10 hours even if you don't cover any distance at all. Low-effort running saves me half of that energy because I spend less time upright.