Movement/Winding Questions

[BlueIn2Red]

Hi all, I have a couple of perhaps naive questions, not really specific to any particular brand or watch, but the context is my AP RO 15400:

1. Does the accuracy of a watch depend on how wound up it is? I've been assuming that a (good quality) watch will, when running at all, keep consistent time. But is it instead the case that being fully wound makes it more accurate than if, for example, it is hardly wound at all?

2. Can wearing the watch "top up" the winding? If for example I wound my 15400 only 20 turns from it being stopped (I never would, but for the sake of a simple example!), but then wore it for several days, would it get topped up to fully wound, or just maintain that initial level? I have a reasonably active life style (plenty of fast walking for instance).