Exit Velocity (Exit Velo) is the velocity in Miles Per Hour the ball moves after contact. This metric has actually been around for a few years. I believe I saw it demonstrated for the first time about 12 years ago. I liked the idea then and still feel it is one of the best metrics for hitters as it will give an indication of potential power or even more an indication of a lack of power.
So, the magic number is 70 MPH for a college level player to be able to hit a ball over 200 feet. I haven't done any math at this so it isn't an exact number but I think it is pretty close so I have established 70 MPH as a goal for my HS hitters and 75 for my college hitters.
(This of course isn't as much of a factor for slap hitters)
HOW THE TESTING IS CONDUCTED
The hitter will hit the ball off of the Batting Tee with the radar gun behind the tee to measure the ball velocity moving off of the tee. It is important to position the radar gun where it doesn't read the bat moving and only read the movement of the ball.
In lessons, I will do 10 swings and take the top velocity of those 10 swings. In showcases it will usually be 5 swings.
OTHER METRICS FROM THIS TEST
So, an obvious statement. We achieve less power when we make poor contact with the ball. So, in lessons, I also test for consistency which is where I take the average velocity and divide by the top velocity. The higher the number the better but since this is new I am not sure what to expect. I will soon post this metric on this website.