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April 24, 2015

Flexible dieters are more successful dieters: weight regain and the tendency to think in black and white terms


Maintenance of a healthy body weight is challenging for many people. Diet success rates are generally low and it has been shown that 50% of the weight loss is usually regained after one year. 
A factor that has been associated with overeating and weight regain is thinking in black and white terms; a personality trait that is called dichotomous thinking. People often hold divided beliefs about food (healthy or unhealthy), their diets (on track or out of track), but also about their weight (acceptable or unacceptable) and these beliefs may lead them to overeating when they have the feeling that they have violated their diet.  
Katerina Palascha
Katerina Palascha
For her Master thesis project, Katerina Palascha conducted a survey among 241 adults. She wrote a paper about the study and recently this paper was published  in Journal of Health Psychology. Quite an achievement!

The study revealed that the greater the self-initiated attempt to control food intake (dietary restraint) the higher the weight regain. However, it was the dichotomous thinking rather than dietary restraint that really predicted weight regain. This implies that when the attempt to control intake is accompanied by a rigid ‘black and white thinking’ style, people’s ability to control their food intake may be inhibited, thus leading to weight regain. In line with this finding, a study of Sairanen and colleagues showed that adopting a more flexible self-restrictive eating behaviour (as opposed to rigid self-restriction) could lead to a better weight loss maintenance and well-being.
Katerina's study again showed the importance of avoiding the 'what the hell' effect. Do not think: 'I have already ruined my diet for today, why not even indulge more..!'. Flexible dieters are more successful dieters.

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