Let me remind people that blanket advice is fine and dandy, but when dealing with specific populations, you have to be a little more specific. And the application of what is often blanketly advised on forums such as this isn't applicable to each individual sub-class of the weight-loss-minded population.
The obese sub-class being a primary example.
Oh my godz, the horrid starvationz modez!!!!11111 is a stupid thing to talk about when dealing with someone who is 200+ lbs overweight.
I think the last thing we need to worry about as a repercussion to the show is obese people experiencing symptoms of the starvation mode and losing muscle. That's almost comical to me and shows a gross misunderstanding of the physiology and biology surrounding said factors in the context of obesity.
I think the point being overlooked here is the human body is only designed to process a certain amount of nutritional intake, water intake and body fat in a 24 hour period. When you exceed that level, then you create an unhealthy situation. And if you take a person who is obese in the first place, and probably has weakened cardio-vascular, digestive, recuperative and immune systems, then the healthy level is probably even lower.
Speaking of the show specifically, its primary goal is to establish a captive audience and make money. Let's not forget that. It's a business before it's a weight-loss tool. A 500 calories/day deficit isn't going to satisfy this primary goal using contestants who have maintenance calorie intakes of 5000+. It's a business and part of the business is selling the hype of big numbers in regards to weekly weight losses.
I don't think anybody would argue that point. All TV is about making money first and any other side benefits are collateral damage (ie, paying out prize money, paying for hospital and doctor visits or paying to build new houses for the unfortunate, etc.)!
Does this make the show horrible?
Of course not. If anything, it shows people that losing weight no matter your current status is possible. I know more people the show has helped than it has hurt. It serves as motivation to many to get up and get moving.
The only negative I can see coming from the show is the idea that it can create false hopes. People who really don't have a clue might expect the same kind of losses you see on the show. All it takes though, is a little common sense to realize that the contestants are living and breathing weight loss every minute of the day in a boot-camp-style atmosphere. To expect those kinds of results, you'd need to be in that type of setting, logically.
What is one of the biggest reason most individuals fail in their fitness goals? They have unrealistic expectations of the amount of time and effort required to achieve their goals and give up when they don't experience immediate results. I would argure that the show only magnifies this problem and sets up more people to fail.
What is so magic about the number ' 500 ' ?
If a maintenance level is 3,500+ calories in one person and a maintenance level is 2,000 calories for another person - why should 500 calories under maintenance be applied to both cases equally ?
Perhaps it might be better to say 15%- 20% under maintenance level ?
Thoughts ?
I agree, every individual is different, and even the same individual experiences changes over time as thier fitness level, age, body composition, mental state, stress level, etc. change. What works for one person, may not work the same for any other, but there are certain limitations on the human body that are somewhat universal; things like adequate nutrition (protien, good fats, vitamins, minerals, etc.), adequate rest and recovery time, etc. If you don't follow those minimum requirements the long term result could be irreversable damage of some kind.
Of course, you could argue, as Stoutman seems to be, that the obese condition is more damaging than the "crash" or "starvation" diet and therefore the crash diet is the lesser of 2 evils. And as he pointed out the people on the show have 24 hour access to doctors and hospitals that the average person does not have, which may mitgate some of the possible side effects.