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Home » Long Term Weight Loss » Why We’re Thinking About Weight Loss All Wrong – Fortune

THE BIGGEST LOSER -- "Season 5 Live Finale"NBC NBCU Photo Bank via Getty Images

For decades, weight loss advice could be summed up in a sentence: burn more calories than you consume. This equation, based on the 3500 rule, in which a calorie deficit of 3500 translates into weight loss of one pound, was intuitive and comforting in its simplicity.

It also made generations of dieters feel terrible about themselves, essentially conflating excess fat with a failure of willpower. If the 69% of Americans who are overweight or obese could simply eat less and move more, this line of thinking went, we wouldnt have a national epidemic on our hands. While researchers have been questioning the validity of the 3500 calorie rule for years, it still informs much of the popular understanding on weight and metabolism.

Thats beginning to change, though. Ironically, a major recent revelation came courtesy of the Biggest Loser , an NBC reality series that, perhaps more than anything else on TV, reduces weight loss to a matter of willpower (contestants on the show compete to lose the largest percentage of their body weight over the span of 30 weeks.)

But new research suggests the real narrative is likely far more complex. In the study, published last May, researchers tracked 14 of the shows contestants, measuring their weight, metabolism, fitness schedule and diet before they were officially selected for the series eighth season, at various points throughout filming, and then six years after the season ended.

Unsurprisingly, all 14 participants were significantly overweight before their stint on The Biggest Loser and all lost a significant amount of weight during filming. More surprising was that, but for a single participant, theyd all regained some of this weight by the studys end, with four participants actually weighing more than they did before going on the show.

The real jaw-dropper? The researchers found that during and after the initial weight loss, participants bodies fought to return to their original weights: across the board, after losing weight on the show, participants metabolism slowed dramatically, meaning their bodies burned fewer calories than is typical for someone their size. This wasnt a temporary change, either as the years passed, not only did their metabolisms not recover but, in many cases, they continued to slow down. At the studys close, season 8 winner Danny Cahill, who lost 239 pounds on the show and regained 100 of them over the subsequent six years, burned 800 fewer calories per day while at rest than is typical for someone his size.

The results are a strong indicator that weight loss shouldnt be reduced to a matter of willpower, says lead author Kevin Hall. Instead, when you cut your calories and increase your physical activity, your body resists that change, he says. Think of it like a string. If you arent trying to lose weight, the string remains slack. But as you cut calories and add exercise, it grows increasingly taut. The more intense your diet and workout gets, the tighter the spring pulls in an effort to return you body to its resting weight.

You will experience a proportional pullback, says Hall, which, if you want to successfully keep weight off, you must resist indefinitely . Its a Catch-22 of sorts. The more successful you are at losing weight, the harder your body will fight to regain it indeed, participants who lost the most weight on the show experienced the largest slowing in metabolic adaption.

If this sounds like a giant bummer, well in some ways, it is. Weight loss, the study suggests, is more difficult than simply moving more and eating less. But Hall feels that by focusing on the pounds participant regained, subsequent coverage pushed an overly negative message. Following high-profile write ups, including this one in The New York Times , he noticed a discouraging trend: Readers were interpreting the study as a reason to give up on weight loss efforts, full-stop. If they couldnt keep it up, the thinking went, that whats the point of even trying?

But this ignores an important detail: at the end of the study, participants, on average, were down 12% from their pre- Biggest Loser weights, a not insignificant amount. Studies have shown that for overweight and obese individuals, even small weight losses can significantly reduce the likelihood of developing conditions such as diabetes, hypertension and heart disease.

In lieu of despair, Hall hopes the study will make people to rethink weight loss. More specifically, he wants to separate its cosmetic draw from its ability to improve health. The former, which typically requires a radical reduction of body weight, is nearly impossible to achieve long term (drop below a certain set weight, and the bodys internal spring begins its vicious tugging). But the latter, which requires individuals to lose a far manageable amount of weight, is attainable through gradual, sustainable lifestyle changes.

Shows like the Biggest Loser help perpetuate that idea that you really need to lose enormous quantities of weight to be healthy and be normal, says Hall. But you dont have to have this rapid or dramatic weight loss to have health benefits. As an increasing body of research suggests, a low BMI and health are not always correlated. Thin people can have heart attacks, and obese people who exercise, dont smoke, and maintain a healthy diet are no more likely to die prematurely than normal-weight individuals who fall into the same categories.

Despite the mounting evidence, however, this isnt a message we hear enough, says Hall. The diet industry, the magazine covers of people shedding half their body weight, an American obsession with rebirth and beauty all have worked together to turn diet and exercise into magical tools that, if we only work hard enough, will make us thin and worthy.

What if we rebranded exercise and diet not as means to a more attractive-looking end, but as tools for improving our overall fitness and health? Hall believes it's time we started.

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Why We're Thinking About Weight Loss All Wrong - Fortune

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Home » Long Term Weight Loss » Why We’re Thinking About Weight Loss All Wrong – Fortune