I used to work at a burger king, it's kind of impossible to eat healthy if you get 50% discounts on fast food O.O
While your at work, can you bring your own lunch/dinner? if not, are you allowed to leave on your break? if there's a healthier fast food establishment near by, you could go there instead.. (The burger King I worked at was right across the street from a subway)
How far do you live from your school or your job? If you live close enough to walk or bike there, you'll get lots of exercise.
Fanexpo 2012: Sakura (Infinity) - Tsubasa