Appetite, autonomy and the limits of compliance

The person has to be able to live the plan

Imagine two people following the same eating routine. One finds it convenient and easy to sustain. The other spends the afternoon hungry, becomes anxious before each weigh-in and treats an unplanned snack as a personal failure. A simple adherence score describes the difference without explaining it.

The useful next question is what makes the routine difficult. Energy needs, work demands, food access, expectations and learned habits may all contribute. Treating every difficulty as insufficient discipline closes the discussion before these possibilities have been examined.

The theme running through Controlling Intuitive Appetite and Consistent Eating is that a workable routine should serve the person. There is no magic diet waiting to remove the need for consistency. The practical task is to make consistency possible without turning ordinary hunger into a test of character.

Learning matters, but so does physiology

Behavioural science helps explain how actions and their consequences become connected. Thorndike’s work and Skinner’s later account of reinforcement are part of that history. A useful distinction is that reinforcement makes a behaviour more likely to recur, while punishment reduces it. “Negative reinforcement” means removal or avoidance of something aversive; it is not simply another name for humiliation. [1,2]

That distinction helps us describe an experience accurately. Someone might repeat a routine because it is enjoyable, because it makes the day easier, or because it avoids criticism. The visible action alone does not tell us whether the person is gaining confidence or becoming more dependent on approval.

Food also supplies energy and nutrients. An account of eating that considers only rewards, habits or motivation is incomplete if it leaves out the person’s physiological response.

Persistent hunger is information

After a ten-week very-low-energy weight-loss programme, Sumithran and colleagues found that several changes in appetite-related hormones and greater reported hunger persisted at a later follow-up. The study does not describe every form of dieting, but it demonstrates why continued difficulty need not mean that someone has stopped caring about their goal. [3]

This is a reason to investigate the demands of an approach. It is not evidence that all weight loss is impossible or that eating more necessarily reduces body fat. An explanation should remain precise enough to distinguish those different claims.

A person can be committed and still find a routine increasingly demanding. A useful conversation asks whether food provision, meal opportunities or expectations need to change. An accusation about willpower does not identify what would help.

Support should increase agency

The social setting also deserves attention. In a laboratory study involving women, Schvey and colleagues found greater cortisol reactivity after exposure to a weight-stigmatising video than after a neutral video. This was an acute response, not a demonstration of long-term weight gain. It nevertheless challenges the idea that a stigmatising message has no physiological relevance. [4]

Self-determination theory offers another useful perspective by emphasising autonomy, competence and relatedness. It encourages a distinction between helping people develop ownership of a routine and relying entirely on outside pressure. This theory is relevant to how support is offered; it is not a validation of EPK. [5]

For the reader, the question is practical: does the approach make decisions easier to understand and adapt, or does it make eating feel increasingly dependent on permission?

How this informs EPK

EPK brings fuelling explicitly into the discussion. Expressing energy provision relative to body mass can provide useful context, but it does not produce an exact requirement on its own. Activity, body composition, age, health and the response over time still matter.

The proposed approach is to treat an estimate as a starting point and difficulty as information. Tracking should help reveal patterns and support decisions. If it adds preoccupation without useful understanding, its role needs reconsideration.

Choose one recurring difficulty and describe when it occurs. Consider what food is available, how long it has been since the last meal, what the day requires and whether the routine can accommodate it. These observations are prompts for reflection, not a diagnosis or a universal prescription.

An eating plan deserves to be judged by more than obedience. It should help the person build a routine they understand, can adapt and can sustain. Adequate nourishment belongs at the centre of that discussion.

Continue reading

• There is no magic diet: make consistency possible
• Why sustaining a calorie deficit can become difficult
• Under-fuelling, cortisol and the persistence of hunger

Related working papers

Read the relevant PDFs: EPK–001 to 007 are the revised version 1.2 papers; EPK–008 to 010 are version 1.0 supplements. Earlier PDFs and DOI records remain on the paper archive.