Why does it become more difficult to lose weight after a while?
It is common for weight loss to slow down or stop after a while, even if you continue with the same habits as before. One important explanation is that the body's energy requirements decrease as weight decreases. A smaller body requires less energy to maintain its functions and to move in everyday life, which means that the energy deficit that previously resulted in weight loss may gradually become smaller.
At the same time, the body undergoes biological adaptations that aim to restore energy balance. Energy expenditure may decrease, while signals related to hunger and appetite may become stronger. This process, often called metabolic adaptation, is a natural part of the body's energy regulation and can make it more difficult to continue losing weight or to maintain the new weight over time.
Spontaneous everyday movement can also decrease during periods of energy deficit. Small movements such as walking, standing, changing position and moving between different activities contribute to total energy expenditure and can influence changes in weight.
Muscle mass also plays an important role in energy expenditure. During weight loss, it is therefore valuable to combine sufficient protein intake with regular strength training to preserve as much muscle mass as possible. This can contribute to a more favourable body composition and create better conditions for long-term weight management.
Can stress and lack of sleep affect weight loss?
Yes. Sleep and stress affect several of the biological and behavioural factors that are important for weight loss. Many people experience increased hunger, greater cravings for sweet foods, lower energy levels and more difficulty maintaining healthy habits during periods of stress or insufficient sleep.
Research shows that lack of sleep can affect the body's systems for hunger, fullness and energy balance. Appetite may increase while interest in energy-dense foods becomes greater. Tiredness can also make it more difficult to be physically active, plan meals and make considered decisions about food and lifestyle habits.
Long-term stress can similarly affect both the body and behaviour. Changes in the body's stress systems have been linked to increased fat storage around the abdomen, while stress can impair recovery, sleep quality and motivation. Many people also find that stress makes it more difficult to maintain routines around food, exercise and sleep.
Good sleep, recovery and stress management are therefore important parts of a long-term strategy for both weight management and overall health. Together with regular physical activity and healthy eating habits, these factors can create better conditions for sustainable weight loss over time.
How can medical treatment help with weight loss?
For many patients, 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 cases, medical treatment can be a valuable complement to diet, physical activity and other lifestyle habits.
Modern medicines for obesity, such as GLP-1-based treatments, work by affecting the body's systems for appetite regulation, fullness and blood sugar control. They mimic hormones that are naturally released from the gut after meals and can contribute to increased feelings of fullness, reduced appetite and lower energy intake over time.
The treatment also affects gastric emptying and signals between the gut and brain that are involved in regulating hunger and fullness. Many patients describe finding it easier to follow healthy eating habits and experiencing less constant focus on food during treatment.
Medicines do not replace lifestyle changes, but for some people they can create better conditions for long-term weight loss and weight stability. Treatment is combined with sustainable habits around diet, physical activity, sleep and recovery and can contribute to improved metabolic health and a reduced risk of weight-related health conditions.
Our understanding of weight regulation has developed considerably over recent decades. Today, we know that body weight is influenced by a complex interaction between biological, psychological and environmental factors. The path to sustainable weight loss therefore often needs to be adapted to the individual's circumstances, needs and treatment goals.
Frequently asked questions about weight loss
Why does my weight loss level off at a weight plateau?
It is common for weight loss to slow down or stop after a while, even if you continue with the same habits as before. One important explanation is that the body's energy requirements decrease as body weight decreases. A smaller body requires less energy to function and to move in everyday life, which means that the energy deficit that previously resulted in weight loss may gradually become smaller.
At the same time, the body may undergo biological adaptations that affect energy expenditure, hunger and appetite, which can make continued weight loss more challenging.
A weight plateau therefore does not mean that the treatment or lifestyle changes have stopped working. In many cases, it can be helpful to review eating habits, physical activity, sleep and recovery to identify factors that are affecting progress. In some cases, adjustments to the treatment plan and any medication may also be appropriate in consultation with your healthcare professional.
How should you eat when you want to lose weight?
To lose weight, you need to create an energy deficit, but your food should still provide enough nutrients, fullness and energy to function in everyday life. A sustainable diet for weight loss is therefore often based on protein-rich foods, fibre-rich carbohydrates, healthy fats and plenty of vegetables.
Protein from foods such as fish, eggs, poultry, pulses, dairy products or tofu can contribute to increased feelings of fullness and help preserve muscle mass. Fibre-rich foods such as vegetables, fruit, berries, pulses and wholegrains can also make it easier to stay full and maintain more stable energy levels.
The goal is not to eat as little as possible, but to choose foods that make it easier to maintain a long-term energy deficit without compromising health, muscle mass and quality of life.
Why am I hungrier now that I have lost weight?
It is common to experience increased hunger after weight loss. When the body loses fat mass, biological mechanisms are activated that aim to restore energy balance and counteract further weight loss.
During weight loss, the levels of several hormones that regulate hunger and fullness change. Signals that increase appetite may become stronger, while fullness signals may decrease. At the same time, the body adapts by reducing energy expenditure, which can make it more difficult to maintain the new weight over time.
These biological adaptations are a natural part of the body's energy regulation and an important reason why long-term weight loss is often more complex than willpower alone. For many people, structured lifestyle habits, support from healthcare professionals or medical treatment can help manage hunger and maintain weight loss over time.
Is it my fault that I gain weight?
Weight gain is rarely the result of a single factor. Body weight is influenced by a complex interaction between genetics, biological mechanisms, hormones, lifestyle habits, mental health, medicines and the environment we live in.
Today, obesity is classified as a chronic disease in which the body's systems for hunger, fullness, energy expenditure and fat storage play a central role. When the body loses weight, biological mechanisms are activated that can increase hunger and reduce energy expenditure, making it more difficult to maintain weight loss over time.
Weight regulation is therefore about much more than willpower. For many people, long-term changes to lifestyle habits and sometimes medical treatment are needed to achieve and maintain a healthy weight.
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