The Hop & Stop Test has received quite a bit of attention over the last year. This is a three minute field test that serves to identify a player's ability to produce force, aborb force, and recognize asymetries in the lower body.
For specific details about this test visit the Hop & Stop section under 'Reserach' on this site. I will be posting more information on this test in the upcoming weeks but if you have any questions please contact me!