Bills225:
Like everyone said, an office job is perfect for gaining. If you do something in a call enter where you're required to be on the phone and at a computer you will blow up due to the inactivity.
And the stress. Call centers are bad for your waistline. Inactivity, stress, encouraging poor dietary habits, and an even poorer work life balance the higher you go in the company.
Last call center I worked out, people were forever fighting the battle of the pudge. Wasn't uncommon to see 300+ lbs people. We had a gym, but the only people who used it were those who were already in good shape. Everyone else would get the fattening cafeteria food, the vending machine food, or stuff from the neaby fast food joints.