How often should an automatic require manual winding?

[caryyee]

I have a very sedentary job, sitting at my desk all day in front of a computer screen. I wear my watch from approx 7am - 6pm each day and I've never had to wind any of my Rolex's. I'm also very active, but when I'm active, I'd switch to my GMT. An hour of exercise at the gym in a group fitness class is enough to keep my GMT going until my next group fitness class, usually 24hrs later. Have never had to manually wind my watches unless I leave them untouched for 40+ hrs.