Slightly non-sequitur. The best thing that I ever did for my body wrt/ having a desk job is making sure that wherever I am my monitor is at eye level and at least 2ft away from my face. I always found that at the end of the work day I had so much tightness in my neck and temples, but once I started using a portable laptop stand [1] that all went away.

[1] such as https://cdn.shopify.com/s/files/1/0192/8184/products/RoostSt...