This will strike most of you as weird, but I have a door-frame pull-up bar, gymnastic rings, a kettlebell, a jump rope and paralleletes for my office at work. I mostly use them on weekends or after normal office hours so it won't distract other people. Exactly what I do varies but often I'll do something like submaximal sets (e.g. 15 pull-ups followed by 15 ring dips) on the hour, every hour, throughout the day. It's a good way to build strength endurance, and it really helps my body reset and relax so I can concentrate more on thinking.
"Any exercise" is definitely better than nothing at all, but I'd do something that addresses your specific issues. For example, I tend to get really tense in my shoulders and upper back when I'm programming, and doing push-ups to failure is a great way of releasing the tension. Back when I was completely out of shape, I managed to build up to 40 push-ups per set in a month of just doing them daily to release tension. I started at 10 and just added one more rep per set every day. It was a nice bonus.
Not weird; awesome. I have a set of gymnastic rings in my bag. I hit the park most mornings for a workout. I also do gymnastic holds at work (L-sit, planche, etc.) I find headstands are great way to remove tension in the upper back. A pull bar would be sweet.
Yeah, I obviously dig it, but not everyone is on our wave length.
Here's one reason having a random assortment of equipment at the office is useful. Loop a 53 pound kettlebell through a gymnastic ring strap and you have yourself a makeshift device for weighted chin-ups: http://instagr.am/p/KkfcV/
"Any exercise" is definitely better than nothing at all, but I'd do something that addresses your specific issues. For example, I tend to get really tense in my shoulders and upper back when I'm programming, and doing push-ups to failure is a great way of releasing the tension. Back when I was completely out of shape, I managed to build up to 40 push-ups per set in a month of just doing them daily to release tension. I started at 10 and just added one more rep per set every day. It was a nice bonus.