There is a new version of the app. Please look for 40 Yard Dash Trainer 1.1 in the play store. Several issues have been resolved in that version.
40 Yard Dash Trainer is for sprint training and training for running in other sports. Very easy to use. The 40 yard dash is considered one of the best ways to judge sports ability. Utilize the included exercise program that will build your muscles up to be explosive. Create strength where you muscles will give you the most speed. This program will help build speed in football, baseball, soccer, track, basketball, and other running sports. You can email yourself the results or post them to facebook