What are the metabolic and behavioral adaptations that slow weight loss?
Thanks to millions of years of evolution guiding us survive deficiency, our body has compensatory survival mechanisms to defend against weight loss. When we principle losing weight, we may unconsciously begin to move less as a “behavioural adjustment” to conserve energy. There are also metabolic adaptations. our metabolism slows down below. Every pound of weight loss can restrict Our resting metabolic rate by seven calories per day. This may only translate to a few percent differences for most, but it can quickly snowball for those who achieve massive weight loss. I discuss this phenomenon in my video The reason for weight loss when dieting.
During one season of the TV show The Biggest Losersome of the contestants had famously high metabolic rates are monitored. As you can see in the graphs below, above and beyond the hundreds of fewer calories required to simply exist when more than a hundred pounds lighter (at 0:55 on my video), by the end of the season, their metabolic rates had slowed down with an extra 500 calories a day (at 1:03 in my video).
What boggles the mind is that when it was is rechecked six years later, they were still short of 500 calories a day. So the contestants had to cut 500 more calories than anyone else their size to maintain the same weight loss. No wonder most of their weight loss was regained. As you can see in the chart below and at 1:23 in mine videomost remained at least 10 percent lower than their original weight, however.
Even a 7 percent drop has been noted is depicted to roughly cut diabetes rates in half, as shown in the chart below and at 1:31 in mine video. However, a slower metabolism means you have to work much harder than everyone else to stay in place. 
Analyzing his four seasons The Biggest Loser minute by minute, researchers famous that 85 percent of the focus was on exercise rather than diet, although the exercise component accounted for for less than half the weight loss. Even six years after their season ended, contestants continued an hour of daily, vigorous exercise yet regained most of the weight they had lost. Why; Because they had started eating more. They could have reduced their exercise to just 20 minutes a day and maintained 100 percent of their initial weight loss if they had just been able to keep their intake to less than 3,000 calories a day. This may not sound like much of a challenge, but losing weight doesn’t just slow down your metabolism. It also increases your appetite.
If it was just a matter of your weight arrangement It will take years for your weight loss to reach the point where your reduced caloric intake matches your reduced caloric output. On the contrary, often it happens within six to eight months. You can see indicative graphs below and at 2:34 and 2:43 in mine video. You may know the drill: Start the diet, stay on the diet, then six months later the weight loss stops. What happened? Don’t blame your metabolism – just that he plays a small place. Instead, you probably stopped sticking to your diet because your appetite went into overdrive.
Let’s break it down. If you cut 800 calories from your daily diet—from 2,600 calories a day to 1,800, for example—and your weight loss stalls after six months, what may have happened is, at the end of the first month, you think you’re still you’re cutting 800 calories, but in reality you may only be cutting about 600 calories a day. In the second month, you may only be cutting about 500 calories, in the third month, 300, and in the sixth month, you may be eating only 200 calories less than before you started the diet. In other words, you may have accidentally experienced an exponential increase in calorie intake during those six months. But, you may not even realize it because, by that time, your body may have grown your body appetite by 600 calories. So you still feel like you’re eating 800 calories less, but it’s actually only 200 calories less. Since an 800-calorie drop in intake can slow your metabolism and physical activity by about 200 calories a day, with no difference between calories in and calories out at six months, it’s no wonder your weight loss stalls completely.
The slow upward shift in caloric intake on a new diet isn’t because you were lazy. Once your appetite has increased by 600 calories after dieting for a while, eating 200 fewer calories at the end is as difficult as eating 800 fewer calories at the beginning. So you can maintain the same disciplined level of willpower and self-control, but still ends up stagnant. To prevent this from happening, you need to maintain a calorie deficit. How is this possible in the face of a captive appetite?
Hunger is a biological drive. Asking someone to eat smaller portions is like asking someone to take fewer breaths. You can squeeze it for a while, but, in the end, nature wins. That’s why I wrote How not to diet. There are foods that can counter our slowing metabolism and suppress our appetite, and ways of eating to counter the behavioral adjustment and even eat more food – yet lose weight.
Due to “the continued slowing of metabolism and increased appetite related with the weight lost,” sustained weight loss requires a persistent calorie deficit of 300 to 500 calories per day. This can be achieved without reducing Portion sizes simply reduce the caloric density of meals, which can lead to the rare combination of weight loss with an increase in both the quality and quantity of food consumed. (See the two graphs below and at 5:34 and 5:40 in mine video.) The bottom line is that sustainable weight loss is not about eating less food. It’s about eating better food.
In my previous video, I go over how The 3,500 calorie per kilogram rule is wrong. In this case, what is it The new calorie per pound weight loss rule? Watch this video to find out.
My book How not to diet it’s all about weight loss and how to break the cycle of dieting. For more on weight loss, check out the related videos below.
See the weight loss topic page for more related videos.
