@SkillyMusic Think you nailed it.
Your body is not meant to be in a sitting condition all day. It's hard because we are in the middle of making a beat you are super proud of, it's hard to just shut off and go walk around.
But here is a super tip.
When making beats get up and play your beat on loop, turn it up. Walk around the house and listen to it while you make yourself something to eat or whatever. I have a stationary bike I jump on. The point is taking a break also makes you hear flaws in your production and makes you analyze it more.
Makes you think, "Dang that needs a snare" or "I just turn that part down"
Anyway, as @Berengere and @SkillyMusic have said.
Don't sit too long, walk around.
I'll be looking at a stand up desk myself too.
If you have room, have both.