Once an hour seems like a lot to me... I could imagine someone getting upset with that. I know when - on the rare occasion - I get a window seat I do leg/foot exercises at my seat... no need to always get up.
Unfortunately, one of the downsides of being in an aisle seat is being inconvenienced by a middle seater or window seater. I never get upset if someone needs to get up... or needs to wake me up.
Just part of being a curtious seat mate.
William