it is in the FAQ.

Sparrow wrote: This isn't in the FAQ, but how much do hiring better coaching staff influence the game, training, etc? I can see how the med staff would help, but does would hiring better coaches make up for less than skilled players?

1. How does the training work?
A player needs to reach 100 points in a particular skill to gain a level/point in that skill. Once he gains a level he again starts from 0 plus training points over the 100 from the last level gain.
Each training cycle (once per week) a player gets 10 +- 2 training points automatically, he also gets points from teamwork (teamwork divided by 2), each player also gets gets training points from the coaches skill (For Example: player is training kicking, the coaches skill in kicking is 17 so the player gets additional 17 training points) and lastly he gets 4 additional points for the training hall and 4 for each consecutive training hall upgrade. He also gains/loses points depending on training intensity and players age. And that's the secret of training in Grid-Iron world.