I can't believe it, but about 16 years ago I could jump with the best of them for my size (5'11"). I trained relentlessly for 5 years trying to see just how well I could improve my collective athletic skill set using an all-natural approach. In terms of jumping improvements, I increased my Standing Broad Jump by 8 inches (9'7" to 10'3"), Standing Vertical Jump by 7 inches (30" to 37"), and Vertical Jump with an approach by 7 inches (39" to 46"). Check it out.... I'm 5'11"