You've told us that you are entered in at least two marathons (Stockholm and MCM01) and that you run every day. Let's assume that you are putting in the mileage--say 50 miles per week--to prepare for these two marathons. Your pace (10 minutes per mile) should have a relatively small effect on the number of calores you burn. Mileage is a more important determinant of your calorie consumption. Perhaps you need to control your weight by controlling your diet rather than by controlling your pace or mileage. One of the qualified dieticians who posts here may offer advice. The main thing is to cut back on fat and sugar. Put some fresh bagels in a cooler in your car and eat one to two of these bagels immediately after your training runs. This might curb your appetite for later snacks. Another idea would be to limit your dinner desserts to a sweet bread or to a nonfat ice cream. Weigh yourself each morning and cut back on your calories whenever there is an uptick. But I think your basic approach of entering and training for multiple marathons is a sound way to stabilize or lower any excess weight.