In fact, your situation is still optimistic, because you are only 13 years old. Many of my classmates were very fat when they were your age, but now they are all cygnets when they grow up, so we should set up our own mentality and beat it psychologically first.

First, are you a boy or a girl? If you are a boy, you should pay more attention to diet and sports: for example, playing basketball! When you grow up or 17 or 8 years old, you will naturally lose weight.

If you are a girl, you must first prescribe the right medicine. You are obese because you weigh 120kg. You can't do much exercise now, because you should study. I will give you some advice based on my own experience. I lost 4 kilograms in a week with these. Although it takes a long time, the faster the time, the faster the rebound. So stick to it. It's winter now, and it's best to lose weight. I'll teach you some now!

1. Drink water. 8 glasses of water a day, you are studying now, so you'd better drink 4~5 glasses of water a day. Drink water first thing in the morning.

2. Exercise more. In fact, doing morning exercises at school every day is very helpful to lose weight. Do it well. She is very helpful for slimming your chest, legs and waist.

It is best to drink a cup of yogurt at noon every day, and if possible, you can share it with the sick fresh yogurt in the refrigerator. This is Lin Chi-ling's magic weapon. I went through three years. Very effective.

4. Sit-ups. The fatter, the more effective. Every night around 30~50, step by step, pay attention to your breathing when you do it, or your muscles will count. It is also good to do something right for your future senior high school entrance examination every day.

Tip: Abdominal breathing. That is, when inhaling, the stomach bulges, and when exhaling, the stomach is suppressed. 3~4 minutes, anytime, anywhere.

This is a summary of my experience, but it is definitely the essence. Please accept it.