by exercising in the morning, you'll raise you body's metabolism for at least 6 hours, this results in your body using more calories while at rest to maintain your bodily functions, breathing, heartrate, digestion etc....
so if you do exercise...do it before work...even just half an hour a day on the exercise bike before work....it will do you a lot of good....then during the day eat small portions often, no large lunches or binging....then eat nothing after 7pm.....
this is proven to work in most people but there is no fast fix when losing weight.....
there are several good exercises that you can do at your desk if you have a job where your infront of a computer all day...
sit with your knees together, back straight and hands loose by your side. Lift your knees up 6 inches keeping them together and hold for 10 seconds. Do 10 reps of this several times a day and it will tighten you abdomen muscles......coupled with a few sit up in the morning you'll have a hard-flat stomach in 6 weeks...