I know for me if I go below 1200 I don't have enough energy for my life. I work with 5/6 year olds, have. 2 and almost 4 year old and exercise 5-6 days a week. I don't trust the machines for calories burned and use a heart rate monitor to be sure. I love to run. without sufficient calories I don't have the energy to keep going. I have been extremely dizzy when trying to strength train on a day where I couldn't eat. I have lost 80lbs in 8 months. I will not go below 1200 by choice (have some days where my band doesn't want food, they are rare) and I just may try Bambam's advice.
Whatever happens, I'm listening to my body now and dizzy,weak, and tired are not what I want out of this banded life.