Good diet for 13 year old and maintaing?

hahah im 13 and used to weigh 159 and are 5'8" too! i kno how u feel but if u just do a lot of core work it will showa difference and the lean meat whole graines veggies and friuts is a good diet i am a vegtarian and have been since i was eight. just try ariobics too. hope this helps =]