I am a junior high school student, age 13. I want to lose weight in the summer vacation, no matter how hard I try, but I want to grow taller, so I must have nutrition. I want to lose 30+ energy in two months? Sure, as long as you have perseverance, keep exercising and control your diet, it's no problem to lose 30 pounds. Make a timetable, such as skipping rope for 30 minutes, doing 50 sit-ups and so on. If you control your diet, eat less or not at night, eat high-calorie snacks and drink carbonated drinks. Breakfast and lunch should be nutritious, and fruits, vegetables, fish and eggs should be eaten every day. As long as you are not very hungry at night, don't eat anything after 6 o'clock, you can eat some fruit. Hang in there, a good figure belongs to you.