I've heard, seen people/trainers boast about getting as much as 6-10 inches on a vertical jump in 2 months, but what if I told you that my greatest achievement for an athlete on the vertical jump was 3 1/2 inches in just shy of 3 months. You probably think that I don't know what I'm talking about or you will want to go train with the 10 inch vert. place. Hold on, do not go anywhere yet!
The 3 1/2 inch vertical jump increase that we improved on was from a highly trained, high level, Division 1 Running Back, who has set rushing records, and achieved rushing titles. Most of the crazy increases that people throw all over Facebook, their website, and use as marketing tools are data that they collected from individuals that have never trained before, or have very little training experience.
Let me explain...when a person has never trained or has very little training experience they will see dramatic increases due to neuromuscular adaptation, basically the brain telling the muscles what to do, when, and how to do it. The window of opportunity is wide open for these individuals. The more trained an athlete becomes, the smaller that window gets. Again, in the beginning of the training life for an untrained (high school, college) athlete, any external stimuli will increase strength, power, speed, efficiency, etc. You could pretty much have them walk around carrying rocks, and throwing them into a creek and they will get positive gains. It's when a person becomes highly trained, the training protocol must be controlled, well thought out, and properly organized in the program to get maximum results.
Now let me answer this question again, and see how it sounds to you: What is the greatest test result that you achieved with an athlete? I helped an athlete achieve a 40 inch Vertical Jump, in less than 3 months. I love my job!!!
Oh, and he also hit a 59 inch Approach Box Jump!!!