Sorry for the late reply, but I would suggest playing basketball a lot if you have your own rim. I had an adjustable rim and started out at touching rim at 9 feet and within one summer I was dunking on 10. But I was playing nearly everyday and always seeing how high I could jump between any little breaks in gameplay. Mind you, at the time I was 17, white, and only 5'7", 140 pounds. So, it can be done. Air Alert 2 would probably help you a lot, but I've never personally tried it and can't recommend something I never tried.
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