I've read in the previous thread (296141.1) that a youth trainer boosts the pop-up of 18 and 19 y.o players alongside with the trainer.
How about the nutrionist and sport psychologist? Do they boost a team's primary staffs' performance (namely, doctor and PR manager)?
Can anyone give me a link in the previous developmental calendar? So sorry I wasn't able to read it. Still new to the game. Need your help. Thanks!