How to train player after he already reached his full potential?

[Ronarch]

Sometimes I see players having regression on almost all aspect but he is only 25-27.
Maybe I set a wrong training focus.

So when there is no room for improvement, what is the best way of training to keep players away from regression?
What training focus should I give to him? Or simply no focus?
What do you guys usually do?

 

[kingtut313]

i train them on whatever role i use them for. if the player isnt playing enough or has been injured, he will regress, however