I am 15 yrs old. I am a little shorter than those of my age.When I was in 8 th and 9 th i was shorter than now and everyone says I acquired heigth in a jiffy when I reached 10 th and I believe in it bcz some of my cousins have experienced the same and I believe acquiring more height.Now Im going for gym and my instructor says less weigthleifting doesnt affect my health.I believe in him and I believe in me that I will acquire more heigth.So what do u say on this....Hope u undestood what I am trying to explain??Expecting a reply soon..