The truth is, much of what we think we know about obesity and weight loss is regularly challenged by science. For example, here are the conclusions of research by Dr. Albert Stunkard of the University of Pennsylvania back in 1986:
The scientists summarized it in their paper: “The two major findings of this study were that there was a clear relation between the body-mass index of biologic parents and the weight class of adoptees, suggesting that genetic influences are important determinants of body fatness; and that there was no relation between the body-mass index of adoptive parents and the weight class of adoptees, suggesting that childhood family environment alone has little or no effect.”
In other words, being fat was an inherited condition.
Having studied this one for years now I can tell you that almost everything we think we know about obesity and weight loss is a myth. For example, we all assume that people who are obese eat too much because they lack will power. But imagine the kind of will power it takes to accomplish what one contestant on “The Biggest Loser” described as his daily routine.
Wake up at 5 a.m. and run on a treadmill for 45 minutes. Have breakfast — typically one egg and two egg whites, half a grapefruit and a piece of sprouted grain toast. Run on the treadmill for another 45 minutes. Rest for 40 minutes; bike ride nine miles to a gym. Work out for two and a half hours. Shower, ride home, eat lunch — typically a grilled skinless chicken breast, a cup of broccoli and 10 spears of asparagus. Rest for an hour. Drive to the gym for another round of exercise.
If he had not burned enough calories to hit his goal, he went back to the gym after dinner to work out some more. At times, he found himself running around his neighborhood in the dark until his calorie-burn indicator reset to zero at midnight.
In other words, other than sleeping, his entire day was devoted to losing weight.
This is one of the people who recently learned that the result of these efforts is that his body is now producing hormones that make him feel hungry all the time and his metabolism has slowed to the point that he needs to consume 800 fewer calories per day than normal-weight people in order to avoid putting on pounds.
Why do the myths continue when the science is saying otherwise? Much of it is because they have become culturally embedded. But the $60 billion-a-year weight loss industry also has a lot a stake in maintaining them. Until we reject these myths and start following what science is telling us, we will continue to see the obesity problem grow.