GUIDE to Spot Fast Trainers - In the new Version

[Vernie83]

You're right. I meant 16% for 60% condition loss. (4% on average at every session consuming 15% of condition)

Al Svanberg had empirically estimated the TEF (training efficiency factor) to 0.28 for a 5* player.

Just scored a 18yo DC repeatedly gaining 5% attributes for each 18% condition loss (6 times press the play)
TEF = 5/18 = 0.278

Yeah, 4% in average each 15% condition loss will make him a fast trainer

[Altiplano]

Without getting too involved in the math if a 5 star player gains 4 skill points after 5 times goalkeeper training plus 1 other drill to develop key attributes only I'll consider him a fast trainer and he's good to go. Would suggest repeating the session 10 times to make sure the player continues to gain an average of 4 skill points per session.