ATTQOTD: I teach at a university, so part of my day is on my feet in a classroom and part is at my desk. For most of the year, I am able to squeeze in two approx 25-min walks around the interconnected buildings, which gets me over 5000 steps. For about 4 months out of the year, I'm so busy with students meetings (right now!) that I can't do that, so I get a lot fewer steps at work.
What I do at work definitely doesn't affect if I can do my training runs. What it does affect is how much time I can devote to those runs. I have to scale it back during my busy times.