For the past 2 weeks, I've been working from a treadmill. It has been incredible. I got a small under-the-desk treadmill for my standing desk and I walk at about 2.5km/hour and get around 20,000 steps in per day. It has improved my mood, my clarity, and also has improved my sleep (because I'm tired of walking). I also find it easier to focus on tasks for some reason.
If you can make a setup like this work for you, I highly recommend it. Your body will thank you in the long run.
EDIT>> A few of you are asking about the model. I actually bought 2, one for myself and one for my partner, who also loves it.
This one is mine https://www.amazon.com/gp/product/B07V7F8QYK. I got it when it had a $100-off coupon, so the price wasn't as steep. No real complaints so far, except you can't store it upright. I just roll it out of the way when I want to sit.
The one for my partner is https://www.amazon.com/gp/product/B0895DRWVY. She likes it. It's a little smaller and can be stored upright and out of the way, which is nice. There have been complaints about the remote (and it only comes with 1), but the manufacturer claims to ship new remotes free of charge if yours breaks.
They're both a little quirky with a very simple LCD screen. Supposedly mine has an app integration for step counting, but I just use my phone in my pocket. They both get the job done.