I work on a keyboard all day for about ten years now,

I got into PC gaming again after work, stopped because i didnt want to sit at a PC after work hours/carpal tunnel symptoms started up.

I got into doing pushups with bad form, stopped because i started getting wrist pain/carparal tunnel stuff from my bad form and then working on a keyboard all day.

To try prevent my desk job from turning me into a human potato:

I try walk before the day starts, run 4 miles at some point during the day, and end the workday with a walk to try keep the blood pumping.