I do bjj 4 days a week with two of those days being on my lunch break, the other three days I walk my dog during lunch, I do 6 sets of push ups, squats, or pull ups on work days, and I using a standing desk in the morning. Just bought a little floor tredmill that I can walk on during meetings as well.

I would probably be in better shape if I was moving all day everyday but I'm pretty sure my body would start to break down as well. I know not everyone has as much freedom but if you work from home it isnt that hard to squeeze in a pretty decent amount of exercise during the work day.