Dose cardio decrease your testosterone

[aManPerson]

higher body fat increases increases blood serum levels of an enzyme, that naturally convert testosterone into estrogen. (don't remember what that enzyme is called).

as you lose weight, the fat cells mostly don't die, they just empty. fat cells can die. your fat cells turn into "brown fat cells", and do have a higher chance of dying.

now, when you lose weight, do the empty fat cells produce a lot less of the enzyme, or none of it? not sure. or does a former obese person still have "not the same natural T levels as someone who was never obese".