Why does long-term stress make it more difficult to lose weight?
Long-term stress can affect several of the biological and behavioural factors that are important for weight loss. When the body is exposed to repeated or prolonged strain, the stress system is activated, which affects hormones, sleep, appetite regulation and energy balance, among other things.
A central part of the body's stress response is activation of the hypothalamic-pituitary-adrenal axis (HPA axis), which leads to the release of the stress hormone cortisol. Short-term increases in cortisol are a normal part of the body's adaptation to challenges and help us mobilise energy. With long-term stress, however, regulation of the stress system can change, which in some people is associated with increased abdominal fat, poorer metabolic health and changes in hunger and fullness signals.
Stress affects not only our biology but also our behaviour. Many people experience increased appetite, greater cravings for energy-dense foods, poorer sleep and reduced motivation for physical activity during periods of high stress.
It is likely the interaction between these biological and behavioural factors that explains why long-term stress can make it more difficult to lose weight and maintain healthy lifestyle habits over time.
The connection between stress, lack of sleep and hunger regulation
Stress and sleep are closely connected. Many people experience poorer sleep quality during periods of long-term stress, while insufficient sleep can intensify the body's stress response. Together, these factors can affect the biological systems that regulate hunger, fullness and energy balance.
Research shows that lack of sleep can affect hormones involved in appetite regulation, including ghrelin and leptin. This can contribute to increased hunger, greater cravings for energy-dense foods and higher energy intake. At the same time, the brain's reward system is affected, which can make food seem more appealing when we are tired or stressed.
Stress and lack of sleep also affect concentration, decision-making and impulse control. For many people, it therefore becomes more difficult to plan meals, be physically active and maintain other healthy habits. Overall, this can make it more difficult to lose weight and maintain weight loss over time.
When stress affects eating behaviour
Stress affects not only the body's physiology but also our relationship with food. Many people find that cravings for energy-dense foods, particularly foods high in fat, sugar or salt, increase during periods of long-term stress, worry or mental strain. At the same time, some people may experience a reduced appetite when stressed.
Stress can affect how we experience hunger, fullness and food cravings. Food can sometimes become a way of managing feelings such as stress, worry, boredom or low mood. Eating may then provide a temporary sense of wellbeing or act as a distraction from unpleasant feelings, although the effect is often short-lived.
Distinguishing between physical hunger and emotional cravings can be an important part of long-term weight regulation. Physical hunger usually develops gradually and can be satisfied by different types of food. Emotional cravings often arise more suddenly, are directed towards specific foods and are influenced more by emotions, habits or situations than by the body's energy requirements.
Greater awareness of these patterns can make it easier to identify stress-related eating and find other strategies for recovery and stress management.
Practical strategies for recovery and stress management
Because stress affects both biological processes and everyday behaviours, stress management can be an important part of a long-term strategy for weight regulation. There is no single method that eliminates stress, but several habits can help the body recover better and reduce the long-term strain on the stress system. For many people, it is about creating regularity in everyday life and giving the body the right conditions for recovery.
Sleep is one of the most important factors. Trying to maintain relatively regular sleeping times and develop good sleep habits can contribute to better recovery and more stable regulation of hunger, fullness and energy levels. Regular meals can also provide structure and reduce the risk of stress negatively affecting eating habits.
Physical activity is another effective way to manage stress. It does not have to involve intense exercise. Walking, everyday movement or another activity that feels manageable can contribute to improved wellbeing, better sleep and increased recovery.
Many people also benefit from techniques that help the body switch from activity to recovery. Deep breathing, mindfulness, yoga or other relaxation exercises can help activate the body's rest and relaxation system and reduce feelings of stress.
Stress management is also about how we relate to demands and thoughts in everyday life. Setting boundaries, planning short breaks and creating space for recovery can reduce mental strain. For some people, it can also be helpful to notice worrying thoughts without automatically treating them as facts and to regularly direct attention towards what is happening here and now instead of things that have already happened or might happen in the future.
Small changes that are made consistently over time often have a greater impact than temporary efforts. The goal is not to avoid all stress, but to create a better balance between activity, recovery and wellbeing.
Medical treatment as support
For many people living with obesity, long-term stress, lack of sleep and biological mechanisms that affect hunger, fullness and energy balance can make it difficult to achieve or maintain weight loss through lifestyle changes alone. In these situations, medication can be a valuable complement to diet, physical activity and other lifestyle habits.
Modern medicines for obesity, such as GLP-1-based treatments, affect the body's systems for appetite regulation and energy balance. Treatment can contribute to increased fullness, reduced appetite and lower energy intake over time. Many patients also find that thoughts about food and cravings between meals decrease, which can make it easier to maintain healthy habits even during periods of stress.
Medicines do not replace lifestyle changes, but for some people they can create better conditions for making and maintaining changes to diet, physical activity, sleep and recovery. When treatment is combined with long-term support, it can contribute to both weight loss, weight stability and improved metabolic health.
At Yazen, medication is combined with support from a multidisciplinary team of doctors and a coach, as well as dietitians, physiotherapists and psychologists when needed. The aim is to help each individual develop sustainable habits and receive support with both the biological and behavioural factors that affect weight and health.
Frequently asked questions about stress and weight loss (FAQ)
Is it possible to lose weight despite having a stressful job?
Yes. A stressful job does not have to be a barrier to weight loss, but long-term stress can make the process more challenging. High demands, time pressure and a lack of recovery can affect sleep, eating habits, physical activity and other factors that are important for weight regulation.
Research shows that it is often the combined burden of stress, lack of sleep and unsustainable lifestyle habits that affects weight, rather than stress itself. Many people manage to lose weight despite having a demanding job by prioritising regular meals, sleep, physical activity and recovery as far as everyday life allows.
The goal does not need to be to eliminate all stress. Instead, it is about creating habits that work even during periods of high workload. For some people, professional support or medical treatment can also be helpful in supporting long-term weight loss.
How do I know if stress is affecting my weight gain?
It can be difficult to determine exactly what role stress plays in weight, but there are certain signs that may suggest stress is affecting your eating habits, recovery or energy balance. Many people experience increased appetite, greater cravings for energy-dense foods, snacking between meals or eating more during periods of high stress.
Other signs may include poorer sleep, low energy levels, difficulty getting started with physical activity or finding it more difficult to maintain habits that previously worked well. For some people, stress causes them to eat less, but for many, stress affects behaviours and habits in a way that can contribute to weight gain over time.
If you recognise several of these patterns, stress may be a contributing factor. Becoming aware of the connection between stress, sleep, eating habits and weight is often a first step towards finding strategies that work for you.
Do GLP-1 medicines help with stress eating?
GLP-1-based medicines are not a treatment for stress itself, but they can affect several of the biological mechanisms involved in appetite regulation and eating behaviour. Many patients experience reduced hunger, increased fullness and fewer food cravings during treatment. Some also describe a reduction in thoughts about food and so-called "food noise".
However, stress-related eating is complex and can be influenced by emotions, habits, sleep, life circumstances and other factors beyond biological hunger. The effect therefore varies between individuals. For some people, medication can make it easier to break patterns of overeating or impulsive eating, while others may also need to work on stress management, sleep, behavioural changes or psychological support.
The best results are often achieved when medication is combined with long-term support for lifestyle habits and recovery. In this way, both the biological and behavioural factors that affect weight and health can be addressed.
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