The 6 Weight-Loss Tips That Science Actually Knows Work

When it comes down to it, the things we know to be true about weight loss are relatively simple, and certainly few. They’re also extremely effective when actually carried out. So, from the researchers who have studied this stuff for decades, here’s pretty much everything we know about weight loss today, whittled down to six points about how the body actually gains, loses, and maintains its weight.


1. Dieting trumps exercising
We hear a lot that a little exercise is the key to weight loss – that taking the stairs instead of the elevator will make a difference, for instance. But in fact it’s much more efficient to cut calories, says Samuel Klein, MD at Washington University’s School of Medicine. “Decreasing food intake is much more effective than increasing physical activity to achieve weight loss. If you want to achieve a 300 kcal energy deficit you can run in the park for 3 miles or not eat 2 ounces of potato chips.” It’s as simple as that. Of course, both together would be even better.

The problem is that when you rely on exercise alone, it often backfires, for a couple of reasons. This is partly because of exercise’s effects on the hunger and appetite hormones, which make you feel noticeably hungrier after exercise.

The other problem with exercise-without-dieting is that it’s simply tiring, and again, the body will compensate. Some of the calories we burn come from our basic movements throughout the day – so if you’re wiped out after exercise, and more likely to sit on the couch afterwards, you’ve lost the energy deficit you gained from your jog.


2. Exercise can help fix a “broken” metabolism, especially during maintenanceWhile exercise may not be as important for weigh loss as calorie restriction, it’s important in another way: It begins to repair a broken metabolism. Within a couple of days of non-activity, the metabolism becomes inflexible. You start moving again, and it does start to change.” Your metabolism may not ever go back to “normal” (more on this below), but theevidence indicates that it can indeed pick up again, in large part through moving your body every day.

This is a large part of why exercise is critical in the maintenance phase, which is well known to be more difficult than the weight loss phase. We think it’s partly because in the extra calories burned from physical activity, you have a bit more flexibility in food intake, so you’re not so much relying on ridged changes in eating habits; it makes it more tolerable.”


3. You’re going to have to work harder than other people – possibly forever
Though exercise can help correct a metabolism that’s been out of whack for a long time, the grisly reality is that it may not ever go back to what it was before gained weight. So if you’ve been overweight or obese and you lose weight, maintaining that loss means you’re probably going to have to work harder than other people, maybe for good. Building muscle can help your body burn a few more calories throughout the day, but it’s also likely that you’ll have to work harder aerobically in the long run.


4. There’s no magical combination of foods
There are low-fat diets, low-carb diets, low glycemic diets, Paleo diets, and a lot of iterations of all of these. There doesn’t seem to be any “right” diet, and there doesn’t seem to be any evidence that one particular diet will work better with an individual’s specific metabolism. We know pretty much that any diet will help you lose weight if you follow it. There’s no magic diet. The truth is that ALL Diets will work if you follow them.”


5. A calorie IS a calorie!
And for energy balance, it’s the number of calories that matters. You can gain weight eating too much healthy food as well as unhealthy. From the standpoint of health, it’s better to eat your veggies…. It’s just a lot easier to overeat calories from junk food than healthy food. But the source of calories obviously matters for other reasons. First of all, no one overeats veggies, so on a practical level, that’s a non-issue. In fact, the food industry has carved out a whole new area of food science to study the “bliss point,” in which foods are created to increase the amount it takes to feel satiated and full.

It’s true that types of foods you eat may, over time, affect your metabolic profile, so they may also matter in this way, but when it boils down, sticking to any reduced-calorie diet will create the energy deficit needed to lose weight.


6. It’s all about the brain As my colleagues have reported, it’s not the body or the metabolism that are actually creating overweight or obesity – it’s the brain. We all know intuitively that poor decisions are what make you gain weight and better ones are what make you lose it. The problem is that over time, the poor decisions lead to significant changes in how the brain governs – and, amazingly, responds to – the hunger and satiation processes. 

While there may be some degree of “damage” to the brain, particularly in how hunger and satiety hormones function, it can correct itself to a large degree over time. The key is that the process does take time, and like any other behavior change, is ultimately a practice.


So boiling it down even further: reduce calories, eat better, exercise, and most of all, remember it is a practice that has to be repeated over time – months or years. The fact that you’ll have to work harder at maintenance than your never-overweight best friend is depressing, but it’s worth coming to terms with. And, most important to remember, your brain (the organ behind all this, after all) is plastic, and it will respond to the changes you make – better than you think. And so will your body.

http://www.forbes.com/sites/alicegwalton/2013/09/04/the-6-weight-loss-tips-that-science-actually-knows-work/