To test your 60 you need to set up three cones - one cone at the 20 yard marker, the second cone at the 40 yard marker, and the third cone at the 60 yard marker.
Next you will have three people clocking the 60 the player runs at each yard marker. You can use phones or any stop watch.
Run the 60 3 times and have each clocker write down their time from the test.
Based on which part of your 60 yards is the slowest then that is how you know where to start.
For example -
1st 20 - 2.9
2nd 20 - 2.5
3rd 20 - 2.3
60 Time = 7.7 Seconds.
Because the first 20 yards is the slowest then the player needs to start with the "20 yard system workout"
The 40 Yard System Workout is what the player uses if their second stretch (from 20-40 yards) is their slowest.
The 60 Yard System Workout is what the players uses if their last stretch (from 40-60 yards) is their slowest.