Is it acceptable to take a short walk break?

I work in an office in a large hospital, whenever I’m feeling stressed or getting jittery I like walking around our building for a few minutes, see parts of it I haven’t seen before.

Maybe I’m overthinking but is getting out of my cubicle and moving around a little bit a normal thing to do? I think my boss thinks I’m just going to the bathroom or something but I’m not sure if it’s something I should even be hiding from her lol