The COVID-19 pandemic has brought into sharp focus what we already knew: stress is closely linked to weight gain. However, the question remains: why exactly is stress problematic in this context? Beyond the surface-level effects, what underlies this relationship? A review by UCLA researchers offers insights into why stress and obesity are intricately connected, revealing a more complex interplay than commonly acknowledged.
How Stress Contributes to Weight Gain
Stress has a profound impact on various systems involved in weight regulation, and these effects are interconnected. They form feedback loops that can influence one another. Let’s explore these systems:
Cognition
Stress can disrupt cognitive functions, including executive function and self-regulation, which encompass skills such as planning, organising, emotional management, concentration, and impulse control.
Behaviours
Stress influences eating habits, physical activity levels, and sleep patterns. Interestingly, within this system, each factor can also affect the others. For instance, inadequate sleep can hinder physical activity, and a lack of physical activity can disrupt sleep patterns.
Physiology
This area delves into the scientific aspect. Researchers outline three ways in which stress might affect individuals physiologically:
- Stress Hormones: Stress triggers the release of hormones that can lead to increased appetite and signal the body to store fat. Scientifically, this is referred to as “hypothalamic-pituitary-adrenal axis activation.”
- Reward Seeking: Stress elevates the brain’s desire for feel-good chemicals, such as dopamine, motivating individuals to consume highly palatable foods rich in sugar and fat or to seek out substances like alcohol or drugs
- Microbiome Impact: While research on humans is limited, there is speculation that stress may negatively affect the gut microbiome, potentially increasing susceptibility to weight gain. Remarkably, the gut microbiome can also influence emotions and behaviours.
Biochemistry
Stress can impact blood chemicals associated with weight control:
- Leptin and Ghrelin: These hormones play a role in hunger and appetite. Leptin suppresses hunger, while ghrelin stimulates it, though the relationship is more intricate than this simplified explanation.
- Neuropeptide Y: This peptide may stimulate both appetite and fat storage.
These interconnected factors provide a comprehensive view of how stress can affect individuals’ weight. However, there is more to explore.
How Obesity Can Induce Stress
Certainly, it’s essential to delve into how obesity impacts stress. Obesity not only affects physical health but also introduces a psychological dimension. The societal stigma associated with obesity can be a potent stressor in itself. People living with obesity may encounter prejudice, bias, and discrimination, which, in turn, contribute to elevated stress levels. This weight stigma-induced stress forms a challenging feedback loop, where stress exacerbates obesity, and obesity intensifies stress. This cyclical relationship highlights the need for a comprehensive approach to health and well-being, one that not only addresses physical aspects but also emphasises the importance of mental and emotional resilience in the face of societal pressures and prejudices. It underscores the significance of empathy, understanding, and support in helping individuals navigate the complex interplay between obesity and stress.
What You Can Learn from This
- Holistic Approach: As someone looking to improve their health, it’s crucial to recognize that nutrition advice is just one piece of the puzzle. While tracking macros like protein, carbs, and fat is important, it’s equally vital to understand that other factors, especially stress, can significantly impact your progress.
- Identify Your Starting Point: If you’re facing challenges with weight management, it’s essential to determine the root cause. If stress plays a significant role in your life, simply focusing on changing your diet might not deliver the results you want. Consider prioritizing strategies to manage stress effectively, build resilience, and regulate your emotions. These skills can create a solid foundation for making lasting improvements in your eating habits and overall lifestyle.
References:
http://dx.doi.org/10.1146/annurev-psych-010418-102936
