First of all, thin friends should know that your body consumes calories too fast, and your body doesn't have enough extra calories to supply muscle growth. So I suggest you eat more! Eat more! Schwarzenegger ate all his food! Some friends will say that they are not fat after eating a lot. Tell you, that's because you obviously don't have enough to eat! So you have to change your original diet and eat more than before! In this way, you will leave excess heat in your body for muscle growth. Weight gain and fat loss are actually the same simple thing, just distinguish the steps and do the same thing: eat your favorite food. Because everyone wants to gain weight now, according to the above, everyone needs to increase their appetite. This way is to eat your favorite food, anything will do! Hamburgers, French fries, fried chicken, and even pizza, eat everything! Your fitness instructor may tell you that these are all junk food. That's right, but now you don't need to eat protein and carbohydrates every day like other people who lose weight and fat. Your task now is to increase your appetite with your favorite food. When your appetite increases, you can gradually replace those junk foods with some healthy foods. If your appetite increases and you eat more, you will gain weight. When your weight reaches the level you want, you should start eating healthy food and get rid of all junk food. Therefore, slowly changing some healthy foods when gaining weight can not only ensure your appetite, but also help you gradually develop the habit of eating healthy foods. Have dessert! Yes, just want to eat dessert! Especially after the training. You just need to remember one simple thing: if you burn more calories yourself, you will burn more calories for fitness, so eat more calories after fitness. Therefore, it is necessary to eat cakes, biscuits and other desserts after health. Friends will worry that they will eat their stomachs. If so, you can completely stop dessert. However, usually, you don't have to worry about friends who are naturally thin: because when you find yourself fat, isn't that what you want?