Are there any ways to lose weight without a diet?

Yes, but basically all of them lead to a reduction in calories, albeit indirectly.
An example is eating a high-fiber diet. Or high in protein but low in carbohydrates.

Although the diet says that we can eat our fill, both fiber and protein are satiating and low in calories. They also act, albeit in different ways, by reducing total calorie absorption through digestion. Same thing if we increase physical activity. Yes, we eat the same, maybe, but we burn more energy.

Therefore, instead of following an imposed diet, you can try an “unusual” dietary approach which however works precisely because it is based on the same mechanism of portion reduction. You end up eating less without realizing it or you burn more.

3 WAYS TO LOSE WEIGHT WITHOUT DIET

1. The mental strategy .

   According to  the International Association for the Study of Obesity, psychological support and the analysis of what lies behind people’s need to eat a lot are a key to promoting diet and weight loss by focusing on motivation.
   In summary: talking about it with a psychotherapist or dealing with everything that revolves around our need for food can be the turning point to lose weight.

2. Eat more slowly.

   The research, published in the American Journal of Clinical Nutrition, states that eating slower rather than voraciously promotes weight loss. Chewing the bite slowly increases the sense of satiety and aids digestion, promoting the correct absorption of nutrients which reduces the sense of hunger throughout the day.

3. “Drink” vinegar.

   According to the Journal of Obesity , it would be enough to add a little vinegar to the smoothies and drinks we consume every day to make us eat less, due to disgust and a vague sense of nausea.
   Vinegar, especially apple vinegar, actually also stimulates lipid metabolism and promotes digestion.

   See also: Food substitutions to lose a pound a week without a diet.