From a sport science perspective, the purpose of testing usually is one of the following:
Depending on the age group and performance level of the team, testing can be:
With those statements in mind you need to decide whether you...must (not), (don't) need to, should (not) test your players.
Fact is, with an increase in age and professionalism of the environment, more time can be spend with the player and therefore testing should be included. Coaching a young team on a recreational level usually means limited time and player availability and therefore the time should (not) be used (for testing, but) to train football specific and multidirectional.
Important components in football that should be tested and monitored are: