You go to the bathroom more or less often. His blood pressure is dropping. When you burn fat primarily for energy, your blood sugar stays balanced and so does your energy level. Eating fewer carbohydrates can help you be a better fat burner, as it allows your body to use fat first to burn it for fuel.
When your body accesses stored body fat and burns it, this leads to weight loss. Becoming a fat burner also means you'll feel satisfied longer, you can spend 3 to 6 hours between meals, you'll have fewer cravings, and you'll eat less. Before you get discouraged and consider getting off the weight loss bandwagon because you don't see a drop in the scale or any change in your BMI, pay attention to these signs of fat burning that your body shows. As fuel for daily activities, including physical exercise, humans burn sugar and fat, along with small amounts of protein and varying amounts of ketone bodies.
If you tone up while losing weight, you may be building up muscle tissue as you burn fat, which means you'll reduce your body fat levels without getting great results on the scale. As you get better at burning fat, you'll notice that less fat is stored around your stomach, hips, legs, and shoulders. It's really surprising to feel the change in your energy level, especially in the middle of the afternoon, once you become more efficient at burning fat. Many of us don't like gawking at ourselves in the mirror, but it's a good indicator of your fat-burning ability.
A precise, though somewhat uncomfortable, way to make sure you're burning fat is to assess body composition at some points during your fitness journey. You burn calories simply by maintaining healthy muscle tissue, so retaining muscles keeps your metabolism high; maintaining your muscle also means that most of the weight loss you see comes from fat. Ultimately, knowing if you're burning carbohydrates or fats for energy isn't essential to losing weight; what matters is burning more calories than you eat. Burning fat requires a healthy lifestyle, which means a varied and complete diet that provides healthy carbohydrates, proteins and fats, in addition to an exercise routine designed to help you lose weight.
A study published in Metabolism Journal showed that athletes developed “extraordinarily high levels of fat oxidation while using a diet to optimize fat burning; the benefits are there when taking them.” While this means that it may take longer to lose excess fat, it prevents the body from entering a state of semi-starvation, in which it will resist burning fat. You can also get a general measure of your body fat levels with a household scale that uses electrical signals to estimate body fat levels and detect changes in body fat over time.