ok i really want to dunk by next year.I am currently 143 lbs. And I'm 5'9. I could snap the rim on a ten foot court.what kind of work outs should i do for me to be able to dunk by the end of this year and the beginning of next year.Please can anyone give me an advice on how can i do it or what kind of workouts will improve my jumping skills.And i am only 15 by the way.Thanks