To gain weight reasonably, you must exercise a lot. Girls have special ladies push-ups to keep their breasts straight. Hold on, and the dimension will naturally increase. Keep exercising at the waist. If you increase nutrition and don't exercise, the meat will run to the waist, abdomen and buttocks, and your figure will be out of shape. Jogging is good, and it won't make your muscles bigger. You can ride a bike.

Add meals on the premise of maintaining exercise, and supplement low-calorie nutrients and protein powder in the morning and afternoon. At this age, after the body has laid a good foundation, it is not so easy to accumulate fat. Fat people are not ugly, but they are afraid that they will gain weight on their stomachs, buttocks and thighs, which is particularly abrupt and difficult to lose weight.

I hope this helps.