172 boys are not short, only that they are not tall. 130 kg is a little fat, but it's ok. If you have to lose weight, it's just right to lose 10 kg. Exercise more, eat less fried and high-calorie snacks and sweets, and don't deliberately diet. Pay a little attention and exercise more. A friend of mine insisted on going to the gym for several months, and his bulging belly disappeared.