Take a break, get up from whatever you’re doing if you can, and walk around. Or if you’re standing all day, go sit down for a minute. Just take a break. Stop reading the news for a few minutes and look at some cat videos. Whatever floats your boat and fits your situation.
During the work week, I get up every hour and do a lap around the office. Sometimes, if I have the time and/or the weather is nice, I take it outside and do a lap around the building. I used to walk on my lunch hour, but I’m taking shorter lunches because I want to be here less and anywhere else more.
Find what works for you. When I’m at home, I try to take the dog on a longer walk for at least one of the three or so he gets in the evening. You deserve a break!