✔ 最佳答案
You have to consume more calories than you burn. Simply put. Eat more. It helpful to eat foods with a high density of calories because they fill your stomach less such as chocolate, nuts and chips. You can eat a lot of sugary food, but because you're young you might get a sugar rush and be unable to concentrate while playing b-ball as well as the fact that sugar isn't good for you and can cause diabetes which is why people try to avoid it. good luck