Vertical Jump Height = Athleticism
Measuring Explosiveness
Almost all combines measure vertical jump heights for all of their athletes.
The NFL combine states....
"While the actual results of vertical jumps shows how high players can leap, that’s really only valuable for wide receivers and their jump-ball ability. The vertical, however, is perhaps the best test of raw Measuring Explosiveness at the Combine.
For offensive and defensive linemen, the vertical can show knee bend and stand-still power generation. For pass-rushers and running backs, explosiveness is of the utmost importance, and the vertical (along with the broad jump) can be the best indicator of that initial burst. The two jumps arguably are the most important parts of the Combine for running backs and pass-rushers."
Personal Trainers and Strength & Conditioning Coaches use the same devices that are used at the combines that their athletes will participate in. Most high school, colleges and gyms have an event called "Pro Day." This is when the final measurements are recorded prior to participating in a combine.
The NFL, NBA, and CFL all use mechanical testers......
If they use one, why don't you?