example :
This is the "star" of my team, Van Nistelroy last day of previous season.
Bought as 18 y.o. ft.
Every season he is finishing with about 125% q.
So next season starts with a 105. In the first day, I give him some extra power-training with GK drills and final drill Winger attack or Shooting.
I increase his q to 110-112% and stop the extra training.
Just what he earns from the daily training for bonus (the two 6pack easy/very easy) and from the games.
After 3-4 seasons, his white good attacking stats looks "mutated" and I think extra training for those will be a waste of greens.

Click image for larger version.  Name: stats VAN NIST.jpg  Views: 103  Size: 80.7 KB  ID: 100139

* V.N. bought with 85% q - in the case of 56% it's worst than above.