Ditto Cofty. DD, I have the Navy Seal workout in my files; I've done it. It is major. If you can do that, without vomiting, passing out or passing out in your own vomit, you are the dude. But it's calories in, calories out. You can accomplish the same weight loss goal with nothing but caloric intake. Of course you won't look quite as cool. With exercise (and absent adding back the calories after a workout to 'reward' yourself) the process is quicker and you will look cooler. But it is about the calories. That, DD, becomes about lifestyle changes, discipline, self control and self awarness (why do we eat?).
Over the years I've noted a number of 'experts' on the 'net and other places tell individuals wanting to lose weight that: 'It's not your fault." Unless someone is holding you down and stuffing calories down your throat it is your fault. "Its not as simple as calories in, calories out." Bull-freaking-shit. That's all its about; anything else would violate the laws of physics.
Another thing that annoys me (wake up Kate I'm talking about discipline and ownership!) is individuals wanting to lose weight who blame it on: their job; their age; their gender; their kids; stress. All of those, and others, can of course contribute to weight problems, but at the end of the day (and the beginning) we own it. It belongs to us. Voicing those 'excuses', even thinking about them as excuses, will set you up to fail.
We evolved over hundreds of thousands of years of scarce calories to want to store any excess as fat and to crave calories. They meant life, making it through the drought, the winter, the famine. The past few generations we have had more calories than we know what to do with (well, we actually do know - we eat them), but our bodies are thinking 1927. BCE. Smartly, limit junk foods, processed foods, fast food, sugar, and the one thing that would have the most immediate affect, soft drinks.