Obesity and autism: understanding the relationship and preventing it
Autism spectrum disorder (ASD) is a neurodevelopmental condition that affects communication, social interaction, and behavioral patterns. Each person with autism is different and has unique needs, but in recent decades, several studies have highlighted a worrying reality: people with autism are at higher risk of obesity than the general population.
Obesity, in itself, is already a public health challenge. When combined with autism, it can have physical, emotional and social consequences that affect the person and their family environment. Therefore, it is essential to understand why this relationship is established, what risks it entails and what strategies we can implement to prevent it and improve the quality of life of people with ASD.
Why are people with autism at higher risk of obesity?
The relationship between obesity and ASD is complex and multifactorial. There is not a single cause, but a set of biological, behavioral and social factors that interact.
Biological and metabolic factors
Some research suggests that people with autism may have alterations in the regulation of circadian rhythm and in certain hormones related to appetite and metabolism , such as melatonin, cortisol, or leptin. These imbalances may favor a tendency towards weight gain.
Medication
Many people with autism receive pharmacological treatment to manage symptoms such as anxiety, irritability, or attention deficit. Some psychotropic drugs have as a side effect increased appetite and weight gain , a factor that can contribute to the development of obesity.
Selective feeding and sensory processing
A very common feature in ASD is sensory hypersensitivity or hyposensitivity. Food is not only eaten: it is also seen, smelled, touched and felt in the mouth. For many people with autism, these characteristics can be overwhelming or, conversely, necessary to seek out specific stimuli.
This translates into selective feeding:
- Preference for certain textures (very crunchy or very soft).
- Rejection of foods with bright colors or intense odors.
- Tendency to choose ultra-processed products, more predictable in taste and texture.
This poorly varied diet can promote excess calories and, at the same time, generate significant nutritional deficits.
Feeding difficulties in people with ASD
Low physical activity
Motor or sensory difficulties, lack of social motivation or a preference for sedentary activities (such as video games or screen use) can reduce the level of physical activity . In some cases, negative experiences in team sports (due to lack of inclusion or adaptation) also favor abandonment.
People with autism are at higher risk of obesity than the general population. It is important to understand why this relationship exists, what risks it entails, and what strategies we can implement to prevent it.
Sleep disturbances
Sleep problems are common in ASD. Lack of adequate rest can alter metabolism and appetite hormones and make the person more prone to eating processed and fatty foods .
Family, social factors and caregiver fatigue
Caregivers often experience physical and emotional fatigue , which impacts family eating and habits. When parents or caregivers are tired, it is easier to turn to quick options such as prepared foods, sugary drinks, or the use of screens to entertain their children. These choices, while understandable, can contribute to a less healthy lifestyle and a higher risk of obesity.
When parents or caregivers are tired, it is easier to turn to quick options such as prepared food, sugary drinks or the use of screens to entertain children.
What can obesity mean for people with autism?
Obesity has important consequences for anyone, but in the context of ASD its effects can be even more marked.
Physical consequences
- Increased risk of type 2 diabetes, hypertension and cardiovascular disease.
- Orthopedic problems and mobility difficulties.
- Sleep apnea, which further worsens rest problems.
Emotional consequences
People with autism are more prone to anxiety or depression. Obesity can add an extra emotional burden, with feelings of frustration and low self-esteem.
Social impact
The stigma associated with weight, added to the social difficulties of ASD, can lead to even greater isolation. This reduces opportunities to participate in educational, recreational or work activities.
The negative cycle
When obesity sets in, it can worsen the symptoms of ASD: less energy, more fatigue, less social interaction, and more difficulty establishing routines. This creates a difficult cycle to break, in which obesity and the disorder feed off each other .
Weight stigma: a public health problem
How to prevent and address this reality?
The good news is that there are many strategies that can help reduce the risk of obesity and promote a healthy lifestyle in people with ASD. The key is to adapt the recommendations to each person and do so gradually and respectfully.
Promote healthy eating habits
- Introduce new foods gradually, help cook, accompany with shopping or plan a healthy menu.
- Offer creative presentations: cut the fruits into attractive shapes, use colors or visual aids.
- Work with dietitians-nutritionists specializing in ASD to adapt recommendations.
- Avoid excessive pressure: the goal is to expand the diet, not turn meals into a source of conflict.
Taking sensory processing into account
- Adapt food textures and temperatures according to the person's tolerance.
- Introduce small and constant changes to reduce resistance.
- Use visual or game strategies (for example, social stories or food stories) to generate interest.
Promote adapted physical activity
- Look for activities that connect with the person's interests (for example, walking while observing insects, dancing, swimming or doing martial arts).
- Propose structured, visual and repetitive routines that provide security.
- Include physical activity in daily life (walking to school, climbing stairs, helping with housework).
To prevent obesity, it is necessary to promote a balanced diet adapted to sensory needs, encourage inclusive and enjoyable physical activity, regulate sleep and provide support to caregivers.
Regulate sleep
- Establish fixed times for going to bed and getting up.
- Create a quiet environment, with little light and noise.
- Avoid screens before going to bed.
- Consult with health professionals if sleep problems persist.
Medical and pharmacological care
- Periodically review medication to assess its side effects on weight.
- Adjust treatments if necessary, always under medical supervision.
Support caregivers
- Recognize the fatigue of the caregiver role and offer support resources.
- Promote spaces for rest and self-care for families.
- Facilitate support groups, counseling, meal grants, and community programs that help share experiences and strategies.
- When the caregiver feels supported and has time to take care of themselves, it is easier for them to establish healthy and sustainable routines for the whole family.
Positive and non-blaming approach
It's important to talk about health and well-being, not just weight. Setting small, achievable goals and celebrating progress can be much more motivating than focusing on the number of pounds.
Playing sports when you have autism
The relationship between obesity and ASD is complex and multifactorial . Biological, behavioral, sensory and social aspects are involved, and therefore there is no single solution. A comprehensive and interdisciplinary approach is needed that involves families, schools, health professionals and the community.
Prevention involves:
- Promote a balanced diet adapted to sensory needs.
- Promote inclusive and enjoyable physical activity.
- Regulate sleep and review medication.
- Support caregivers, so they can establish healthy routines without feeling overwhelmed.
Beyond the numbers on the scale, what is at stake is the quality of life of autistic people and their families. Committing to inclusive, healthy and respectful environments is the best way to prevent obesity and promote a good quality of life.
