The distribution of body fat and weight loss is largely determined by genetics and individual body composition. It's common for people to lose weight in certain areas of the body more quickly than others. There are several factors that can contribute to why you may have lost weight in your stomach but not in your legs or arms, including:


Body composition: Different areas of the body have different amounts of muscle and fat. If you have more fat in your stomach area than in your arms and legs, you may lose weight in your stomach area more quickly.


Exercise routine: The type and intensity of exercise you engage in can also impact where you lose weight. For example, if you have been doing cardio exercises that primarily work your core muscles, you may see more weight loss in your stomach area.


Hormones: Hormones can play a role in the distribution of body fat. For instance, women tend to store more fat in their hips and thighs due to the hormone estrogen.


Age: As we age, our metabolism tends to slow down, which can make it more difficult to lose weight in certain areas of the body.


It's important to remember that weight loss should be approached in a healthy and sustainable way. Focus on making lifestyle changes that can contribute to overall weight loss and improved health, rather than targeting specific areas of the body. A balanced diet, regular exercise, and reducing overall calorie intake can help with weight loss, and remember to consult with a medical professional before making any significant changes to your diet or exercise routine.