[strken]

My mental model of bodyweight is that my body can adapt to use less energy to some degree, probably a few thousand kJ at most. If I exercise or drop my caloric intake and it's still within that range, I won't have to dig into fat reserves much. If I do more than that, I absolutely will.

As you say, doing low to moderate intensity exercise for a long time -- like walking 20km a day for a week, which is double what the Hadza walk -- is enough to cause me to lose weight unless I'm eating more to make up for it.

[nutrie]

Yeah, everyone’s different. My intake is around 10k kcal when cycling throughout the day, and it’s like nothing. How much I climb matters though, by a lot (at least 2 000 m). Strangely enough, hiking doesn’t cut it for me, it doesn’t go down much even after 50 km/day, which is wild (I still do it though).