Doesn't that just say it all when it comes to correlation and causation?
Have a good day...and learn another language!
According to U.S. researches, this ubiquitous weight-loss [NewMe here: in other words, cut 3,500 calories and you will automatically lose 1 pound] rule is overly simple and overly optimistic. And it can lead to unrealistic expectations about how quickly you can achieve a weight-loss goal.
The rule contends that cutting 200 calories a day from your diet would lead to a loss of 20 pounds over the course of a year and the weight loss should keep on going. But in reality that doesn’t happen. Weight loss slows and eventually comes to halt despite the drop in calorie intake.
This past weekend, at the American Association for the Advancement of Science’s annual meeting in Vancouver, an international team of researchers unveiled a new formula to better predict how people will lose weight on a diet.
The 3,500-calorie assumption doesn’t account for how metabolism changes during weight loss.
Your metabolism is the rate at which your body burns calories, and it’s largely determined by how much muscle you have, since muscle burns more calories at rest than body fat. Ultimately, it’s your metabolism that dictates how easily you will lose or gain weight.
As the body slims down, metabolism slows, causing it to burn fewer calories at rest. A smaller body also burns fewer calories during exercise. The net result: a sluggish rate of weight loss that can frustrate dieters and cause them to abandon their plan.
Now health-care professionals and researchers have a tool to more accurately predict a dieter’s expected weight loss over time, based on changes to metabolism. Having a more realistic sense of what to expect can help people stay motivated over the long term.
The new formula and accompanying web-based model were developed by researchers from the U.S. National Institutes of Health, the World Health Organization, Columbia University and Harvard School of Public Health,
The online tool – called the Body Weight Simulator – requires people to input their age, gender, body weight, height, activity level and weight goal (bwsimulator.niddk.nih.gov).
It then simulates what diet and exercise changes are required to reach the goal weight and what changes are necessary to maintain it over time.
Using this model, the researchers found that people’s bodies adapt slowly to dietary changes.
For example, the average overweight person needs to cut 100 calories from their current intake per day to lose 10 pounds over three years.
Half of the weight will be lost in one year and then you’ll reach a plateau, slowly losing the remainder by three years.
In contrast, for the same calorie reduction, the 3,500-calorie formula predicts you’ll lose 10 pounds in one year – and 30 pounds by three years.