Alisa – Research psychologist
So we’ve just had a talk about nursing the soul. So I think it is fitting that I now talk about nursing the body. So in particular, I want to talk to you about a sentence which you might have said to yourself at some point or you’ve heard someone else say. And the sentence is this: “Losing weight is easy; just eat less and exercise more”. And you see this in the media a lot.
So, it’ll come up as sort of a sarcastic headline from the university of all this every once in a while. And it seems like a rational premise. So if calories in is less than calories out, you lose weight, right? No. It’s how it would work if we were talking about Celebrex. And it is totally legitimate thing from a physiological standpoint.
But if we are talking about people, it is more complicated than that. So what can psychology research tell us about weight loss? Well, first let‘s look about some of the assumptions we have about how easy it’s going to be for us. So a few years ago, there was a survey where they asked people who were trying to lose weight what sort of weight loss they were aiming for. And the average for that was around 25 kilos, or 55 pounds. So the actual average weight loss that people reports after 12 months of just eating less, is around 6 kilos.
So people who eat less and exercise more around it. But still a lot less than you would expect. And that’s just the people who stuck to it. So that’s out of everyone who started out, at the end of 12 months, only 50 percent are still making effort. So also problem is that, once we lose this weight, the amount will vary depending on what you were doing. What happens afterwards is that we gain at least some of the weight back.
So basically what empirical research suggests to us is that, for the vast majority of us, just eating less as a weight loss strategy, really, really, doesn’t work. Right. So obviously this is the problem. Because our expectations do not align with reality and in part these expectations are perpetuated by the media and commercial weight loss programs which promise us quick, easy and drastic weight loss.
And what happens is we don’t internalize these beliefs and we try to lose weight by sheer willpower alone, and we are not very good at it. And we assume that’s because we’re greedy and lazy and whatever. So this idea that ‘if you want to lose weight, you should just eat less.’ is wrong. And it is counter-productive.
So from a psychological standpoint, why do we fail? And what are some of the things that we can do to counteract this? Some of this is in a kind of problem-solution problem-solution format. So first, most diet will tend to be structured around deprivation. So people will look at these really lovely food that they like to eat, and say ‘right, I’m not going to eat that anymore, because high in fat and high in calories or whatever.’ So they are in the state of deprivation which is basically punishing yourself. And you cannot do it for a very long time. Eventually, you are going to cave, because being in that state is very unpleasant.
So the alternative is to change your preferences. So you have to eat the food you like. So if we assume that you know salad is very good for you, but you hate salad. Don’t have salad, have something else. And it’s going to take time and energy to find what it is that you like or what works for you. But its worth it because in the long run, you will be able to do that for longer.
Now second thing is self-control. I touched upon this briefly but we have this idea that, if only we had enough willpower, weight loss will be really easy. Now, what psychology tells us is that we have a finite amount of self-control. OK, if you think of it like a muscle, when you use it, you get tired. And that is what happens with self-control. We exert self-control, and become fatigue. In psychology, this is called ego depletion. And then we are less able to use self-control again.
So if you think about going to the gym, right, when you really hate going to the gym. What happens is that you’re going to be tired from the physical activity. But you’re also going to be mentally exhausted, because you’re forcing yourself to do the thing that you really hate.