Yep, slow down enough so that you don't sweat and can breathe 100% through your nose. At first you'll be very slow but if you keep on going weeks after week you'll slowly get faster. A big part of it is mental too, if you're in relatively good shape even as a complete beginner your body shouldn't complain too much for at least an hour, if you're experienced you should be able to sustain that for hours

That's what I do as an amateur but then again I have no running watch, I run in $15 shoes, I don't care about PR, distance, &c. all I care about is slowly and safely building cardiovascular endurance