Why don't more people work out, when they're on the road working? I mean, it's easy right? But, is it simple?
In the bit of "web-search" I did, I found the following very helpful:
Simple: Having few parts, not complex, elementary.
Easy: Having little impact, requiring little effort, posing no difficulty.
Through definition, then, it should be apparant that the reason people don't work out while they're out working is not because it's not easy (make sense?); it's because the structures are not in place to support such activity. Take a look and see if you are organized to get a workout in...while you're out working.