Sedentarianism
It's not atrophy. It's targeted wait loss.
A wise scary old man once told me his favorite piece of advice. He was starting a new job with lots of travel and 100 hour weeks. The boss called him in and said "This job is a marathon. And if you aren't in shape you won't finish. Make sure you take the time to exercise and stay healthy"
Despite the fact it was given in the late 1700's it's still good advice. The way we live is incredibly restricted and the work we do is desky, computery, meetingy stuff. I run around more than anyone else on my team and I'm still not covering more than 10 blocks in a day. There's access to gyms and you can always do crunches push-ups and what not in your room. But you haven't got much free time and traveling anywhere is a hassle.
Without further ado: I love you crappy stationary bike.
You make my knees ache less and keep my back from seizing up while I'm typing. You're as adjustable as a brick chimmeny and you shake like a parkisons patient and have the resistence of a fratboy's rohypnol'ed date. But despite all your obvious and inexplicable flaws you reduce atrophication and midnight muscles spasms. And as soon as I get home I'm never going to think about you again.
-PNG
Now go for a walk, y'hear?