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1. Explanations for success and failure of dieting Learning Objectives: -To understand why diets succeed. -To understand why diets fail. -Be able to evaluate these…
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  • 1. Explanations for success and failure of dieting Learning Objectives: -To understand why diets succeed. -To understand why diets fail. -Be able to evaluate these explanations.
  • 2. What is a diet?• Dieting is a form of restrained eating.• Dieting involves a voluntary restriction of food intake.• Dieting is the main consequence of body dissatisfaction.• Majority of dieters are women.• 87% of women have dieted at some time.
  • 3. What does successful diet mean?• Wing and Hill (2001) suggest: ‘..long-term weight loss maintenance, involving the intentional loss of at least 10% of initial body weight and keeping it off for at least one year’.• 20% of diets succeed.• But since diets vary and so too do people’s experiences, dieting is difficult to measure.
  • 4. Explanations for failure of diets• Restraint theory: sees dieters as placing a cognitive boundary on food intake and then indulging in reduced eating. However, such behaviour can lead to episodes of overeating.• Tested using pre-load/taste test (see notes)• Boundary model can explain why dieters overeat.• Cognitive shifts (see notes)• Mood (see notes)• Denial (see notes)
  • 5. Further reasons why diets fail• Most diets are unsustainable.• Dieters set unrealistic goals.• The more restrictive the diet, the more it will fail.• Low-calorie diets have many unpleasant side effects (and hence diet is abandoned).• Biologically, the hormone ghrelin stimulates appetite, making hungry people hungrier during dieting.
  • 6. Explanations for success of diets• Due to combinations of strategies that produce weight loss in a realistic and attainable manner and then maintaining the weight loss over an extended period.• Relapse prevention (achieving stable energy balance around the newer lower weight).• Motivation and confidence.• Incentives (OC) and social support (social networks).• Achievable and realistic targets
  • 7. Activity1. Decide if the Restraint theory comments are strengths or limitations and decide which ones to keep (Trash or Treasure).2. Decide which comments you will ‘cut up’ and keep for Failure of diet (Trash or Treasure)3. Decide which comments you will ‘cut up’ and keep for Success of diet (Trash or Treasure)
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