The age old question. There is no answer. Compromise is the key. I have spent many years trying to answer this question with no success. My OPINION is this... Weight loss is about diet, period. Excersize is about quality of life. It is a strange concept but the fact is if you excersize your body will burn fat, and then you will get hungry. Interestingly excersize will also make your body use calories more efficiently so theoretically the more you excersize the fewer calories you will burn at rest. Just saying....