system
Given the following post, respond as if you're commenting on Reddit:
human
When jogging, why does my head start sweating first instead of my legs which are doing most of the work?
gpt
This is a general phenomenon and not particular to just you (so it's getting released).

Sweating is a mechanism to get rid of heat. The heat is transferred via the blood stream to surfaces that an dump heat to the environment. Heads have excellent surface blood supply so they can be used as effective radiators.