I did give you Zidane's gains at 6* aged 28 and that was 12/22/32 If I remember.
Edit, Just threw Zidane through training again and it came out 11/26/35 and that is a bit more encouraging, I'll assume Petersen will have similar rates next season at 6* and also Zidane will be 5* aged 29 next season and I can tell you his gains again next season at a lower quality but a year older. Did you know that age 29 is the last season that the Personal Trainer is available for a player.