system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 When doing the same amount of physical labor, why do some people sweat a lot while others don't?
gpt
Differing homeostasis methods that only work right under some circumstances. People genetically adapted to high heat with lots of environmental water will sweat a lot, and quickly, when under stress, because that's the optimal outcome. People descended from wetter climes will sweat less but maybe reduce their metabolism to reduce heat generation.

It's also a matter of fitness, people who are fit will tend to sweat 'sooner' than people who are unfit - their bodies know that they need to cool off fast before the workout starts.

Some rare people have disorders - they sweat constantly or at the slightest provocation, or they don't sweat at all.