How To Stay Active In A Call Center/ Office Enviroment?

I really think it's possible to sit for long periods at work and still be active in your off time. A lot of people who do gym workouts, lift, run, hike, swim, and/or walk many miles per week for exercise, spend equally as many leisure hours sitting on their bum whether watching TV, messing around online, or whatever...whether they sit at work or not. No one works out for 10 hours per day.

When you switch jobs you will want to be in good shape for being on your feet and walking all day...and I believe you probably can get there, even with being seated and inactive during your shifts at the call center position. Just get in a good routine of daily activity when you are off the clock. Honestly I doubt it will do much good to talk to HR/management...the nature of your position is seated office work, so I'm not sure how they could really change that and it doesn't sound like you're covered by ADA for disability related accommodation or anything so drastic...

I include myself in the office/sedentary thing too - and I am pretty active and maintaining a major loss (over 100 lb and over 4 years of maintenance). I walk and hike a lot, several days per week and every weekend, but at work I sit for almost my entire 8 hour shift, Monday through Friday. Granted, it's more of a traditional office and I'm not responsible for answering/making such frequent phone calls - so I'm not quite as chained to my work space. But there are several times every day that I don't get up even hourly, just due to being absorbed in whatever I am doing.

Just make it a big point to find activity at night, in the morning, or both, and it shouldn't affect your progress or success. If you do that I have a feeling you will be very prepared for your new position when the time comes.

Since you are about to leave that job anyway, I'd forget about talking to the boss and try to be more active outside of work for now. I go to the gym and lift in the morning before work. I walk during my break. I keep myself active at home in the evenings.
Since this call center is just temporary I wouldn't push it too hard about getting extra break times to be active. There's plenty of people who work desk job or office jobs that require them to stay seated all day. We get through it by finding ways outside of work to be active and making our break minutes count too.
There's light at the end of the tunnel for you because you're only there for a short time more.

Some people like the desk-cycles. Must you remain seated or can you stand up next to your desk and do some squats and push ups and stretches ?

Can you also maybe put a ball on your chair to sit on? Like a basketball with a cushion over it, just for some instability? Flex and point toes, you can also look up plenty of stretches for strengthening ankles, calves and plantars while sitting.
What about squats, pushups, stretches, jumping jacks, whatever in front of the tv when you get home?

Glad I could help Nothing I mentioned will burn that many calories (unless you manage to do it all day), but it helps you fidget and keeps you awake while you deal with work. I kinda hate that I have to sit during my most awake hours, so i'm constantly looking for a way that I can move at work without being obvious.

One strengthening exercise I forgot to mention:

-Raise both legs together as high and straight as you can under your desk. Toes pointed out (towards wall/back desk panel) will raise endurance over time. Toes pointed at ceiling will stretch muscles in back of leg. hold until you have to put them back down, or alternate between toe direction.

Again, won't burn much but will help strengthen while you are stuck at a desk, and depends on how long your legs are. I'm a petite woman so I have room to do this one...