I'm a year into my first career step, working as a software -developer/-architect/-programmer/etc for a company of less than 20 people.
During the past year, I've developed anxiety, depression, rage issues, control issues, and numerous other mental health problems. I'm currently on two antidepressants that seem to have no effect.
I can say with certainty that my mental issues come from lack of body movement. Not lack of exercise per ce, as I have no desire to work out. Rather, my issues stem from being confined to a chair in a windowless, fluorescent-let room for 8 hours a day.
I am a visual-kinesthetic learner. I can look at someone's movement and copy it exactly. When I'm working on a problem, the best way is for me to process it half-consciously while I engage other sensory systems as a distraction. My best work and brightest ideas are generated in this manner. When confined my behavior strongly resembles that of an ADD person - I'm fidgety, distractable, and irritated (I have been evaluated and I do not have ADD). Also, my productivity tanks. On bad days I'm working about 3-5 hours out of 8. Not intentionally, but because my mind literally cannot focus for long enough on actual work).
Unfortunately, my workplace is a relic from the 80s: the software, hardware, AND the people (I'm the youngest by 15-20 years, I'm 21). When I asked my boss about being able to get up and move around during the day, the answer I received was, "Sure, walk around the block a couple times. But then I need you back here working." The possibility of working from home was also shot down because, "then everyone would want to, and then I can't keep tabs on them." Not a direct quote, but very close.
How should I address this? Doing nothing means my mental problems will continue to escalate. I've seen (and still see) a couple of therapists (and psychiatrists), but none have been any help (most seem eager to help me cope, but coping hasn't worked for the past year so far). The occasional ten minute walk doesn't work, as usually I need more time than that to mull over problems and really understand them (but when I do, I can sit and code for 10+ hours straight). Stretching doesn't work either, since that simply serves to remind me that I am confined. Stretching is a relief, but as soon as I quit the anxiety, depression and, (most scary to me) aggression/rage all come roaring back.
Despite being a new hire, I seem to be rather important at my workplace. I've been tasked with bringing a company from dumb-terminal/green-screen applications to a distributed client-server architecture (for now ignoring the anxiety from inexperience issues, haha). My work (literally mine, I'm the only one on this project) will be used across three different states. However, I don't believe I'm important enough to leverage that in order to change a workplace that hasn't changed in 5+ years (the timestamp on the last edit in the employee handbook is from the early 00s...) Furthermore, I'm in a rural Midwest US town, so employment opportunities in my field are VERY limited.
So, Workplace.SE, what can I do? Do I bring this to my boss (again)? If so, what would be the best way to bring this up (given the completely different perspectives on workplace, etc)? Should I continue with the therapy and such, hoping for a relief? Or is computer stuff simply not the career for me (it's my passion and I've been coding since I was 13/14) and I should just cut and run, find a new job/career/degree/etc? Or something else?
Please help! (I am seeing a therapist, so please don't recommend that) (also, if this is too specific, tell me and I will try and make it more general - this is not meant to be a medical question - it is definitely a workplace/career question in my mind)
[EDIT] A number of answers seem to address a lack of exercise component. While this is certainly a factor, it's unfortunately already one I've addressed (I exercise every other day in the mornings and I practice martial arts three days a week). The problem here is that I seem to literally need to do something else while I process the problem I'm currently working on, until a breakthrough in conception is achieved - this seems to be a concept unheard of in the global workplace, which creates more discomfort and unease, as I wonder if that means I have underlying neurological issues...