hello everyone , i live in h.k, 16olds around 5"6 130lbs, i really want to dunk or jumping higher , but i dont know what can i do , i already try air alert 4 but not useful i think  , so i hope all of u can give me some jumping program or training , so i can finish my dream , dunking!
p.s i am not good at eng...and i just touch the basket net...